#include <iostream>
#include <iomanip>
#include <cmath>
using  namespace std;
int main ()
{
    int R;
    cin >> R ;
    double V = (4.0/3.0)*3.14159* pow(R,3);
    cout << fixed << setprecision(3);
    cout << "VOLUME = " << V << endl;



    return 0;
}