[tex]V = \pi R^2 G[/tex]
real r, g, v, pi
pi <- 3.14159265
citeste r, g
v <- pi * r ** 2 * g
scrie v
#include <iostream>
#include <cmath>
using namespace std;
int main(){
long double r,g,v, pi = atan(1) * 4;
// tan(pi / 4) = 1, pi/4 in cadranul 1 -> pi / 4 = arctg(1) -> pi = 4 * arctg(1);
cin >> r >> g;
v = pi * r * r * g;
cout << v;
}
