#include <stdio.h>
#include <math.h>

void degreesToRadians(float degrees)
{
    float radians = degrees * (M_PI / 180.0);
    printf("%.2f\n",radians);
}

int main()
{
    float degrees;
    if (scanf("%f", &degrees)== 1)
    {
        degreesToRadians(degrees);
    }
    return 0;
}