#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define REP(i, n)           for(int(i)=0;(i)<(n);++(i))
#define REPEAT(i, k, n)     for(int(i)=(k);(i)<((k)+(n));++(i))
#define EPS 1e-4

double dp[1001000];
double dice[] = {1./12,2./12,3./12,1./12,3./12,2./12};

int main(){
    int T;
    cin >> T;

    REP(i,1000000){
        int j = i+1;
        double r = 0;
        REP(k,6){
            if(j-k-1 > 0) r += dp[j-k-1]*dice[k];
        }
        r++;
        dp[j] = r;
    }

    REP(i,T){
        int N;
        cin >> N;
        printf("%.12f\n", dp[N]);
    }
    return 0;
}