func_code_string: #include <bits/stdc++.h>   using namespace std;   const double _PI = 3.141592653589793;   double n, m, k, ans = 0;   signed main() {     scanf( %lf %lf %lf , &n, &m, &k);     ans += ((n * n * sqrt(3)) / 4) * (sqrt(n * n * 2 / 3)) / 3;     ans += (m * m) / 3 * (sqrt(m * m / 2));     double S = (k * k * 5) / (4 * tan(_PI / 5)), r = S / (2.5 * k);     ans += S * sqrt(3 * k * k / 4 - r * r) / 3;     printf( %0.12lf , ans);   }   