200624

//

//

//////public class Main {

////// public static void main(String[] args) {

////// System.out.println("asdas");

////// }

//////}

////

////public class Main {

//// public static void main(String[] args) {

//// System.out.println("\"!@#$%^&*()\"");

////

////}}

////

////public class Main {

//// public static void main(String[] args) {

//// System.out.println("\"C:\\Download\\hello.cpp\"");

//// }

////}

//

////public class Main {

//// public static void main(String[] args) {

//// System.out.print("Hello\n");

//// System.out.println("World");

//// System.out.printf("%.2f", 1.15135);

//// }

////}

//

///*

// * 정수 > 1, 2, 3, -1, -2,

// * 실수 > 1.23, 5.456

// * 문자 > 'A', 'C', '7', '%'

// *

// * 1 bit > 8 > 1 byte > 1024 > 1KB > 1024

// * 정수 > int(4), long(8)

// * 실수 > float(4), double(8)

// * 문자 > char(2)

// */

//import java.util.Scanner;

//

//public class Main {

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

// int a = t.nextInt();

// int b = t.nextInt();

//

// System.out.println(a+b);

// }

//}

//

//

//

//

//

//

//

//

//

////

////

////

////

//import java.util.Scanner;

//public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

// int a = t.nextInt();

//// int b = t.nextInt();

// System.out.println(a);

//

// }

//}

//

//import java.util.Scanner;

//public class Main{

//public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

// float a = t.nextFloat();

//// float b = t.nextFloat();

// System.out.printf("%.6f",a);

////}}

//

// import java.util.Scanner;

// public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

// int a = t.nextInt();

// int b = t.nextInt();

//

// System.out.printf("%d %d", a, b);

// }

// }

//import java.util.Scanner;

//public class Main{

//public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

// int a = t.nextInt();

// // int b = t.nextInt();

// System.out.printf("%d %d %d ",a ,a, a );

// }

// }

//

//import java.util.*;

//

//public class Main {

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

// int a = t.nextInt();

// int b = t.nextInt();

//

// System.out.println(a+b);

// }

//}

/*

* +

* -

* *

* / > 5/2 = 2.5

* 정수/정수 > ? 정수

* 5/2 = 2

* 형변환 >

* (float)5/2 = 2.5

* % > 5/2 = 2...[1]

*

*

*/

//import java.util.*;

//

//public class Main {

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

// int a = t.nextInt();

// int b = t.nextInt();

// long a = t.nextLong();

// System.out.println(a+b);

// }

//}

//import java.util.*;

//public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

// long a = t.nextLong();

// long b = t.nextLong();

// System.out.println(a+b);

// }

//}

//

//

//import java.util.*;

//public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

//

// int a = t.nextInt();

//// int b = t.nextInt();

//

// System.out.printf("%d",-a);

//

// }

//}

//

//

//import java.util.*;

//public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

// int a = t.nextInt();

// int b = t.nextInt();

//

// System.out.println(a/b);

//

// }

//}

//import java.util.*;

//public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

// long a = t.nextInt();

//

// System.out.println(a+1);

//

// }

//}

//import java.util.*;

//public class Main{

// public static void main(String[] args) {

// Scanner t =new Scanner(System.in);

//

// long a = t.nextInt();

// long b = t.nextInt();

// long c = t.nextInt();

// System.out.println(a+b+c);

// System.out.printf("%.1f",(a+b+c)/(float)3);

// }

//}

//import java.util.*;

//public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

//

// int a = t.nextInt();

// int b = t.nextInt();

//

// System.out.println(a/b);

//

//

import java.util.*;

public class Main{

public static void main(String[] args) {

Scanner t = new Scanner(System.in);

int a = t.nextInt();

System.out.printf("%.3f",(float)9/5*a+32);

}

}

////////

////////

////////////public class Main {

//////////// public static void main(String[] args) {

//////////// System.out.println("asdas");

//////////// }

////////////}

//////////

//////////public class Main {

////////// public static void main(String[] args) {

////////// System.out.println("\"!@#$%^&*()\"");

//////////

//////////}}

//////////

//////////public class Main {

////////// public static void main(String[] args) {

////////// System.out.println("\"C:\\Download\\hello.cpp\"");

////////// }

//////////}

////////

//////////public class Main {

////////// public static void main(String[] args) {

////////// System.out.print("Hello\n");

////////// System.out.println("World");

////////// System.out.printf("%.2f", 1.15135);

////////// }

//////////}

////////

/////////*

//////// * 정수 > 1, 2, 3, -1, -2,

//////// * 실수 > 1.23, 5.456

//////// * 문자 > 'A', 'C', '7', '%'

//////// *

//////// * 1 bit > 8 > 1 byte > 1024 > 1KB > 1024

//////// * 정수 > int(4), long(8)

//////// * 실수 > float(4), double(8)

//////// * 문자 > char(2)

//////// */

////////import java.util.Scanner;

////////

////////public class Main {

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

//////// int a = t.nextInt();

//////// int b = t.nextInt();

////////

//////// System.out.println(a+b);

//////// }

////////}

////////

////////

////////

////////

////////

////////

////////

////////

////////

//////////

//////////

//////////

//////////

////////import java.util.Scanner;

////////public class Main{

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

//////// int a = t.nextInt();

////////// int b = t.nextInt();

//////// System.out.println(a);

////////

//////// }

////////}

////////

////////import java.util.Scanner;

////////public class Main{

////////public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

//////// float a = t.nextFloat();

////////// float b = t.nextFloat();

//////// System.out.printf("%.6f",a);

//////////}}

////////

//////// import java.util.Scanner;

//////// public class Main{

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

//////// int a = t.nextInt();

//////// int b = t.nextInt();

////////

//////// System.out.printf("%d %d", a, b);

//////// }

//////// }

////////import java.util.Scanner;

////////public class Main{

////////public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

//////// int a = t.nextInt();

//////// // int b = t.nextInt();

//////// System.out.printf("%d %d %d ",a ,a, a );

//////// }

//////// }

////////

//////

////////import java.util.*;

////////

////////public class Main {

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

//////// int a = t.nextInt();

//////// int b = t.nextInt();

////////

//////// System.out.println(a+b);

//////// }

////////}

//////

///////*

////// * +

////// * -

////// * *

////// * / > 5/2 = 2.5

////// * 정수/정수 > ? 정수

////// * 5/2 = 2

////// * 형변환 >

////// * (float)5/2 = 2.5

////// * % > 5/2 = 2...[1]

////// *

////// *

////// */

//////

////////import java.util.*;

////////

////////public class Main {

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

//////// int a = t.nextInt();

//////// int b = t.nextInt();

//////// long a = t.nextLong();

//////// System.out.println(a+b);

//////// }

////////}

//////

////////import java.util.*;

////////public class Main{

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

//////// long a = t.nextLong();

//////// long b = t.nextLong();

//////// System.out.println(a+b);

//////// }

////////}

////////

////////

////////import java.util.*;

////////public class Main{

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

////////

//////// int a = t.nextInt();

////////// int b = t.nextInt();

////////

//////// System.out.printf("%d",-a);

////////

//////// }

////////}

////////

////////

////////import java.util.*;

////////public class Main{

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

//////// int a = t.nextInt();

//////// int b = t.nextInt();

////////

//////// System.out.println(a/b);

////////

//////// }

////////}

//////

////////import java.util.*;

////////public class Main{

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

//////// long a = t.nextInt();

////////

//////// System.out.println(a+1);

////////

//////// }

////////}

//////

////////import java.util.*;

////////public class Main{

//////// public static void main(String[] args) {

//////// Scanner t =new Scanner(System.in);

////////

//////// long a = t.nextInt();

//////// long b = t.nextInt();

//////// long c = t.nextInt();

//////// System.out.println(a+b+c);

//////// System.out.printf("%.1f",(a+b+c)/(float)3);

//////// }

////////}

////////import java.util.*;

////////public class Main{

//////// public static void main(String[] args) {

//////// Scanner t = new Scanner(System.in);

////////

//////// int a = t.nextInt();

//////// int b = t.nextInt();

////////

//////// System.out.println(a/b);

////////

////////

//////

//////import java.util.*;

//////public class Main{

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

//////

////// int a = t.nextInt();

//////

////// System.out.printf("%.3f",(float)9/5*a+32);

//////

////// }

//////}

////

//////import java.util.*;

//////public class Main{

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

////// int a =t.nextInt();

//////

////// if(a<10) {

////// System.out.println("small");

////// }

////// }

//////}

//////

//////import java.util.*;

//////public class Main{

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

////// int a = t.nextInt();

//////

//////

////// if(a>=10) {

////// System.out.println("big");

////// }

////// else if(a<10)

////// {System.out.println("small");}

//////

////// }

//////}

////

//////import java.util.*;

//////public class Main{

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

//////

////// int a = t.nextInt();

////// int b =t.nextInt();

//////

////// if(a>b) {

////// System.out.println(">");}

////// else if (b>a) {System.out.println("<");}

////// else if (a==b) {System.out.println("=");}

////// }

//////

////// }

//////

//////import java.util.*;

//////public class Main{

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

//////

////// int a = t.nextInt();

////// int b = t.nextInt();

//////

////// if(a>b)

////// {System.out.println(a-b);}

////// else {

////// System.out.println(b-a);

////// }

////// }

//////}

//////

//////import java.util.*;

//////public class Main{

//////public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

////// int a = t.nextInt();

//////

//////

//////

////// if(a%7==0) {

////// System.out.println("multiple");}

////// else {

////// System.out.println("not multiple");}

////// }

//////

//////

//////}

//////

//////import java.util.*;

//////public class Main{

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

////// int a = t.nextInt();

////// int b = t.nextInt();

////// int c = t.nextInt();

//////

////// if((a+b+c)/100%2==0){

////// System.out.println("대박");

////// }

////// else {

////// System.out.println("그럭저럭");

////// }

////// }}

////

//////import java.util.*;

//////public class Main{

//////

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

////// int a = t.nextInt();

////// int b = t.nextInt();

////// int c = t.nextInt();

//////

////// if(a<=170) {

////// System.out.println("CRASH");

////// }

////// else if(b<=170) {

////// System.out.println("CRASH");

////// }

////// else if(c<=170) {

////// System.out.println("CRASH");

////// }

////// else {

////// System.out.println("PASS");

////// }

////// }

//////

////

//////

//////import java.util.*;

//////public class Main{

////// public static void main(String[] args) {

////// Scanner t = new Scanner (System.in);

////// int a = t.nextInt();

////// int b = t.nextInt();

////// int c = t.nextInt();

//////

////// if(a<=170) {

////// System.out.println("CRASH "+a );

//////

////// }

//////

//////

////// else if(b<=170) {

////// System.out.println("CRASH "+b);

//////

////// }

//////

////// else if(c<=170) {

////// System.out.println("CRASH "+c);

//////

////// }

////// else {

////// System.out.println("PASS");

////// }

////// }

//////}

//////

////import java.util.*;

////public class Main{

//// public static void main(String[] args) {

//// Scanner t = new Scanner(System.in);

//// int a = t.nextInt();

//// int b = t.nextInt();

////

//// /*

//// * 30분 전

//// * 입력받은 분이 <-30->

//// * 0~29 : 빌려오는 시간

//// * 30~59 : 깍아도 되는 시간

//// *

//// *

//// *

//// */

////

////

////

////

////

//// if(b>=30) {

//// System.out.printf("%d %d", a, b-30);

//// }

//// else {

//// if(a==0) {

//// System.out.printf("%d %d", 23, b+30);

//// }

//// else {

//// System.out.printf("%d %d", a-1, b+30);

//// }

//// }

////

//// }

////}

//////

//////import java.util.*;

//////

//////public class Main {

////// public static void main(String[] args) {

////// Scanner t = new Scanner(System.in);

//////

////// int arr[] = new int[10];

////// int max = -1;

//////

////// System.out.println("input data is ");

////// for(int i=0; i<10; i++) {

////// arr[i] = (int)(Math.random()*10);

////// System.out.print(arr[i] +" ");

////// }

//////

////// for(int i=0; i<arr.length; i++) {

////// if (arr[i] > max) {

////// max = arr[i];

////// }

////// }

////// System.out.println("maximum data is "+max);

////// }

//////}

////

////

////

////

////

////

//import java.util.*;

//public class Main{

// public static void main(String[] args) {

// Scanner t = new Scanner(System.in);

// int a = t.nextInt();

// int b = t.nextInt();

// int c = t.nextInt();

//

// if(c>=a && c>=b) {

// if(c < a+b)

// {

// System.out.println("yes");

// }

// else {

// System.out.println("no");

// }

// }

// else if (b>=a && b>=c ) {

// if(b<a+c)

// System.out.println("yes");

// else {

// System.out.println("no");

// }

// }

// else if(a>=b && a>=c) {

// if(a<c+b)

// System.out.println("yes");

// else {

// System.out.println("no");

// }

// }

//

// }

//}