#include<stdio.h>
#define Pi 3.14
int main()
float degree to radian(float);
{
float degree,radian;
scanf("%f",&degree);
if(degree<=1000)
{
rad=degree to radian(degree);
printf("%.2f",radian);
}
return 0;
}
float degree to radian(float degree)
{
    float radian;
    rad=degree*Pi/180;
    return radian;
}