//
//
//////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");
// }
// }
//
// }
//}