#include <bits/stdc++.h>
using namespace std;
const long double PI = 3.141592653589793238;
int main() {
  int T;
  cin >> T;
  while (T--) {
    int x, y, z, p, _x, _y, _z, q;
    cin >> x >> y >> z >> p >> _x >> _y >> _z >> q;
    x -= _x; y -= _y; z -= _z;
    if (p > q) swap(p, q);
    long long D = 1ll * x * x + 1ll * y * y + 1ll * z * z;
    long double ans;
    if (D >= 1ll * (p + q) * (p + q)) ans = 0;
    else if(D <= 1ll * (p - q) * (p - q)) ans = 4 * PI * p * p * p / 3;
    else {
      long double d = sqrtl(D);
      long double a = p + q - d;
      long double b = 3 * (p + q) + d;
      ans = PI * a * a * (12ll * p * q - a * b) / 12 / d;
    }
    printf("%.20Lf\n", ans);
  }
}