#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
using T = tuple<int, int, int>;
#define al(a) a.begin(), a.end()
#define ral(a) a.rbegin(), a.rend()
#define sz(a) (int)a.size()
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rrep(i, n) for (int i = 1; i <= (n); ++i)
#define drep(i, n) for (int i = (n)-1; i >= 0; --i)
#define db(a, b) cout << #a << ": " << a << " " << #b << ": " << b << endl;

int main() {
  const int MX = 1000005;
  const double INF = 1e18;
  vector<double> dp(MX, INF);
  dp[0] = 0;
  rrep(n, MX - 1) {
    dp[n] = 1;
    rrep(i, 6) {
      int p = 6;
      if (i == 1) p = 12;
      if (i == 3) p = 4;
      if (i == 4) p = 12;
      if (i == 5) p = 4;
      int ni = max(0, n - i);
      dp[n] += dp[ni] / p;
    }
  }

  int t;
  cin >> t;
  rep(ti, t) {
    int n;
    cin >> n;
    cout << fixed << setprecision(15) << dp[n] << endl;
  }
  return 0;
}