#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,ll> P;
#define REP(i,n) for(ll i=0;i<ll(n);i++)








const double pi=acos(-1.0);





int main(void){
	cin.tie(nullptr);  ios_base::sync_with_stdio(false);
	ll i,j;



	int T;
	cin >> T;
	while(T--){

		ll a,b,c,r;
		cin >> a >> b >> c >> r;

		ll a1,b1,c1,r1;
		cin >> a1 >> b1 >> c1 >> r1;


		ll d=(a-a1)*(a-a1)+(b-b1)*(b-b1)+(c-c1)*(c-c1);


		if((r+r1)*(r+r1)<=d){
			cout << 0 << endl;
		}

		else if(d<=(r-r1)*(r-r1)){

			ll R=min(r,r1);
			double V=4.0/3.0*pi*R*R*R;
			cout << fixed << setprecision(12) << V << endl;



		}
		else{

			double dd=sqrt(1.0*d);
			double x=(r*r-r1*r1+d)/(2.0*dd);
			double y=(r1*r1-r*r+d)/(2.0*dd);

			double v=pi/3.0*(2.0*r*r*r-3.0*r*r*x+x*x*x);
			double u=pi/3.0*(2.0*r1*r1*r1-3.0*r1*r1*y+y*y*y);

			cout << fixed << setprecision(12) << v+u << endl;

		}









	}






	return 0;

}