#include <iostream>
#include <iomanip>
using namespace std;

double DP[1000007];
double p[7];

int main()
{
	p[1] = 1. / 12;
	p[2] = 2. / 12;
	p[3] = 3. / 12;
	p[4] = 1. / 12;
	p[5] = 3. / 12;
	p[6] = 2. / 12;

	for (int i = 1; i < 1000001; i++) {
		DP[i] = 1;
		for (int j = 1; j <= 6; j++) {
			if (i - j > 0) {
				DP[i] += DP[i - j] * p[j];
			}
		}
	}

	int t;
	cin >> t;
	for (int i = 0; i < t; i++) {
		int n; cin >> n;
		cout << fixed << setprecision(6) << DP[n] << endl;
	}

    return 0;
}