#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(){
	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(d>=(r+r1)*(r+r1)){
             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;
			if(r<=r1) cout << fixed << setprecision(15) << V << endl;



		}
		else{

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

			double v=pi*(double)(2.0*r*r*r/3.0-1.0*r*r*x+x*x*x/3.0);
			double q=sqrt(1.0*d)-x;
			double u=(double)(pi/3.0*r1*r1*r1*2.0)-(double)(pi*1.0*r1*r1*q)+(double)(pi*q/3.0*q*q);

			cout << fixed << setprecision(15) << v+u << endl;

		}













	}






  return 0;

}