#include <algorithm>
#include <iostream>
#include <cstdio>
#include <map>
#include <numeric>
#include <cmath>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <complex>
#include <string.h>
#include <unordered_set>
#include <unordered_map>
#include <bitset>
#include <iomanip>
#include <sys/time.h>
#include <random>
using namespace std;

#define endl '\n'
#define ALL(v) (v).begin(), (v).end()
#define RALL(v) (v).rbegin(), (v).rend()
#define UNIQ(v) (v).erase(unique((v).begin(), (v).end()), (v).end())

typedef long long ll;
typedef long double ld;
typedef pair<int, int> P;
typedef complex<double> comp;
typedef vector< vector<ld> > matrix;
struct pairhash {
public:
    template<typename T, typename U>
    size_t operator()(const pair<T, U> &x) const {
	size_t seed = hash<T>()(x.first);
	return hash<U>()(x.second) + 0x9e3779b9 + (seed<<6) + (seed>>2);
    }
};
const int inf = 1e9 + 9;
const ll mod = 1e9 + 7;
const double eps = 1e-8;
const double pi = acos(-1);

int m;
double a[1000010], b[1000010], t[1000010];
int idx;

double f(double x) {
    double res = 1.0, lg = log(x);
    for (int i = 0; i < a[idx]; i++) res *= x;
    for (int i = 0; i < b[idx]; i++) res *= lg;
    return res - t[idx];
}

double df(double x) {
    double res = 1.0, lg = log(x);
    for (int i = 0; i < a[idx]-1; i++) res *= x;
    for (int i = 0; i < b[idx]-1; i++) res *= lg;
    return res * (a[idx] * lg + b[idx]);
}

double newton(double x) {
    for (int i = 0; i < 200; i++) {
        x = x - f(x) / df(x);
    }
    return x;
}

void solve() {
    for (int i = 0; i < m; i++) {
        if (b[i] == 0) {
            cout << pow(t[i], 1.0/a[i]) << endl;
        } else if (a[i] == 0) {
            cout << exp(pow(t[i], 1.0/b[i])) << endl;
        } else {
            idx = i;
            cout << newton(pow(t[i], 1.0/a[i])) << endl;
        }
    }
}

void input() {
    cin >> m;
    for (int i = 0; i < m; i++) cin >> a[i] >> b[i] >> t[i];
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(12);

    input();
    solve();
}