#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main() {
int t;
cin >> t;
const double denominator = pow(16, 16);
for (int i = 0; i < t; i++) {
int a, b, c;
cin >> a >> b >> c;
double numerator = pow(a, 16) + 1820 * pow(a, 12) * (pow(b, 4) + pow(c, 4));
double P = numerator / denominator;
cout << fixed << setprecision(10) << P << endl;
}
return 0;
}

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