#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <set>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
#include <cstdio>
#include <cstring>
#include <iterator>
#include <bitset>
#include <unordered_set>
#include <unordered_map>
#include <fstream>
#include <iomanip>
#include <cassert>
//#include <utility>
//#include <memory>
//#include <functional>
//#include <deque>
//#include <cctype>
//#include <ctime>
//#include <numeric>
//#include <list>
//#include <iomanip>

//#if __cplusplus >= 201103L
//#include <array>
//#include <tuple>
//#include <initializer_list>
//#include <forward_list>
//
//#define cauto const auto&
//#else

//#endif

using namespace std;


typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

typedef vector<int> vint;
typedef vector<vector<int> > vvint;
typedef vector<long long> vll, vLL;
typedef vector<vector<long long> > vvll, vvLL;

#define VV(T) vector<vector< T > >

template <class T>
void initvv(vector<vector<T> > &v, int a, int b, const T &t = T()){
    v.assign(a, vector<T>(b, t));
}

template <class F, class T>
void convert(const F &f, T &t){
    stringstream ss;
    ss << f;
    ss >> t;
}

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define reep(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,n) reep((i),0,(n))
#define ALL(v) (v).begin(),(v).end()
#define PB push_back
#define F first
#define S second
#define mkp make_pair
#define RALL(v) (v).rbegin(),(v).rend()
#define DEBUG
#ifdef DEBUG
#define dump(x)  cout << #x << " = " << (x) << endl;
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;
#else
#define dump(x) 
#define debug(x) 
#endif

#define MOD 1000000007LL
#define EPS 1e-10
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3fLL
#define maxs(x,y) x=max(x,y)
#define mins(x,y) x=min(x,y)

#define double long double

double powmod(double x,int y){
	double a=1;
	while(y){
		if(y&1) a=a*x;
		x=x*x;
		y>>=1;
	}
	return a;
}

inline double f(int a, int b, double x){
	return powmod(x, a) * powmod(logl(x), b);
}

// double pre[11][11][100010];
int a,b;
double t;

double solve(int a, int b, double x){
	double l = 0;
	double r = 1024;
	rep(i,100){
		double mid = (l+r)/2;
		double val = f(a, b, mid);
		if(x<val) r=mid;
		else l=mid;
	}
	return l;
}

void mainmain(){
	int m;
	scanf("%d", &m);
	// rep(i,11){
	// 	rep(j,11){
	// 		if(i==0&&j==0) continue;
	// 		reep(k,1000,10000){
	// 			if(pre[i][j][k]==0){
	// 				if(i==0){
	// 					pre[i][j][k]=pow(M_E, pow(k/10000., 1./j));
	// 				}
	// 				else if(j==0){
	// 					pre[i][j][k]=pow(k/10000., 1./i);
	// 				}
	// 				else{
	// 					pre[i][j][k]=solve(i,j,k/10000.);
	// 				}
	// 			}
	// 			if(k*pre[i][j][k]<100010) pre[i+1][j][min(int(k*pre[i][j][k]), 100009)]=pre[i][j][k];
	// 			if(k*logl(pre[i][j][k])<100010) pre[i][j+1][min(int(k*logl(pre[i][j][k])), 100009)]=pre[i][j][k];
	// 			else break;
	// 		}
	// 	}
	// }
	// rep(i,11){
	// 	rep(j,11){
	// 		reep(k,1, 100010){
	// 			if(pre[i][j][k]==0){
	// 				pre[i][j][k]=pre[i][j][k-1];
	// 			}
	// 		}
	// 		for(int k=100010-2;k>=0;k--){
	// 			if(pre[i][j][k]==0){
	// 				pre[i][j][k]=pre[i][j][k+1];
	// 			}
	// 		}
	// 	}
	// }
	// assert(m<100000);
	// double MX = 0;
	// double MN = 1e100;
	rep(_,m){
		// if(_%10000==0) printf("%d\n", _);
		scanf("%d%d%Lf", &a, &b, &t);
		if(a==0){
			double ans = powl(M_E, powl(t, 1./b));
			printf("%.10Lf\n", ans);
			continue;
		}
		else if(b==0){
			double ans = powl(t, 1./a);
			printf("%.10Lf\n", ans);
			continue;
		}
		// int tt = t * 10000;
		// double l = pre[a][b][tt]-5;
		// double r = pre[a][b][tt]+5;
		double l = 1;
		double r = 6;
		rep(i,50){
			double mid = (l+r)/2;
			double val = f(a, b, mid);
			// cout << mid << " " << val << endl;
			if(t <= val) r = mid;
			else l = mid;
		}
		// maxs(MX, l);
		// mins(MN, l);
		printf("%.10Lf\n", l);
	}
	// printf("%Lf, %Lf\n", MX, MN);
}


signed main() {
    mainmain();
}