SOLUTION OF URI 1011

//     question of uri  1011 Sphere // 1011  (Mahmud_Jamil) BRUR

#include <stdio.h>
#include <math.h>
int main()
{
    double r,pi=3.14159,a,x;
    scanf("%lf",&r);
    x=r*r*r;
    a=(4.0/3)*pi*x;
    printf("VOLUME = %.3lf\n",a);

    return 0;
}