//
//
//////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();
//////