#include<stdio.h>
#define pi 3.14
float degree_to_radian(float)
int main ()
{
    float degrees;
    scanf("%f",&degrees);
    {
        float radian;
        radian=degrees*pi/180;
        return radian;
    }
    if (degrees<1000)
          {
            printf("%.2f\n",radian);
          
          }
    
    
}