#include <iostream>
#include <math.h>
using namespace std;

double pi = acos(-1);

int x, y, z;
double result[100];
double theta1;
double theta2;
double tri1;
double tri2;
double temp1;
double temp2;

void input(int a)
{


    for (int i = 0; i<a; i++)
    {

        double sss;
        double yyy;
        cin >> x;
        cin >> y;
        cin >> z;
        theta1 = acos((x*x + z*z - y*y) / (2 * x*z));
        theta2 = acos((y*y + z*z - x*x) / (2 * y*z));
        tri1 = x*x*sin(2*theta1)/2;
        tri2 = y*y*sin(2 *theta2) / 2;
        sss = x*x*theta1;
        yyy = y*y*theta2;
        temp1 =(sss - (float)tri1);
        temp2 = yyy - tri2;
        cout << temp1 << endl;
        cout << temp2 << endl;
        result[i] = x*x*pi - temp1 - temp2;
    }
    for (int i = 0; i < a; i++)
    {
        printf("%.3f\n", result[i]);
    }
}

int main()
{
    int a;
    cin >> a;
    input(a);
    return 0;
}