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

int main() {
    double degrees, radians;

    // Input
    scanf("%lf", &degrees);

    // Conversion formula: radians = degrees × (π / 180)
    radians = degrees * (M_PI / 180.0);

    // Output with 2 decimal places
    printf("%.2lf\n", radians);

    return 0;
}