using System;
using System.Linq;
using System.Diagnostics;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using Number = System.Int64;
namespace Program
{

    public class Solver
    {

        public void Solve()
        {
            const double p = 1.0 / 6;
            var T = sc.Integer();
            var A = new double[7];
            A[6] = 1;
            var B = new double[7];
            for (int i = 0; i < 5; i++)
                B[i] = 1;
            var mat = new Matrix(7, 7);
            for (int i = 0; i < 5; i++)
                mat[i, i + 1] = 1.0;
            for (int i = 0; i < 6; i++)
                mat[5, i] = p;
            mat[5, 6] = mat[6, 6] = 1;
            Matrix.otaku(mat);
            for (int _ = 0; _ < T; _++)
            {
                
                var k = sc.Long();
                
                var ret = Matrix.Pow(mat, k);


                var ggg = 0.0;
                for (int i = 0; i < 7; i++)
                    ggg += ret[5, i] * A[i];

                ret = Matrix.Pow(mat, k);
                var fff = 0.0;
                for (int i = 0; i < 7; i++)
                    fff += ret[5, i] * B[i];
                IO.Printer.Out.WriteLine(ggg / (1.0 - fff));
            }
        }
        public double hoge(int K)
        {
            var F = new double[250];
            var G = new double[250];
            for (int i = K - 1; i >= 0; i--)
            {
                for (int j = 1; j <= 6; j++)
                {
                    if (i + j <= K) { F[i] += 1.0 / 6.0 * F[i + j]; G[i] += 1.0 / 6.0 * G[i + j]; }
                    else { F[i] += 1.0 / 6.0f; }
                }
                G[i] += 1.0;
            }
            var ans = G[0] / (1.0f - F[0]);
            return ans;
        }

        public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
        static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; }
        static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
    }
}

#region main
static class Ex
{
    static public string AsString(this IEnumerable<char> ie) { return new string(System.Linq.Enumerable.ToArray(ie)); }
    static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); }
    static public void Main()
    {
        var solver = new Program.Solver();
        solver.Solve();
        Program.IO.Printer.Out.Flush();
    }
}
#endregion
#region Ex
namespace Program.IO
{
    using System.IO;
    using System.Text;
    using System.Globalization;
    public class Printer : StreamWriter
    {
        static Printer() { Out = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; }
        public static Printer Out { get; set; }
        public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
        public Printer(System.IO.Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
        public Printer(System.IO.Stream stream, Encoding encoding) : base(stream, encoding) { }
        public void Write<T>(string format, T[] source) { base.Write(format, source.OfType<object>().ToArray()); }
        public void WriteLine<T>(string format, T[] source) { base.WriteLine(format, source.OfType<object>().ToArray()); }
    }
    public class StreamScanner
    {
        public StreamScanner(Stream stream) { str = stream; }
        public readonly Stream str;
        private readonly byte[] buf = new byte[1024];
        private int len, ptr;
        public bool isEof = false;
        public bool IsEndOfStream { get { return isEof; } }
        private byte read()
        {
            if (isEof) return 0;
            if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } }
            return buf[ptr++];
        }
        public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; }

        public string Scan()
        {
            var sb = new StringBuilder();
            for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
                sb.Append(b);
            return sb.ToString();
        }
        public string ScanLine()
        {
            var sb = new StringBuilder();
            for (var b = Char(); b != '\n'; b = (char)read())
                if (b == 0) break;
                else if (b != '\r') sb.Append(b);
            return sb.ToString();
        }
        public long Long()
        {
            if (isEof) return long.MinValue;
            long ret = 0; byte b = 0; var ng = false;
            do b = read();
            while (b != '-' && (b < '0' || '9' < b));
            if (b == '-') { ng = true; b = read(); }
            for (; true; b = read())
            {
                if (b < '0' || '9' < b)
                    return ng ? -ret : ret;
                else ret = ret * 10 + b - '0';
            }
        }
        public int Integer() { return (isEof) ? int.MinValue : (int)Long(); }
        public double Double() { return double.Parse(Scan(), CultureInfo.InvariantCulture); }
        private T[] enumerate<T>(int n, Func<T> f)
        {
            var a = new T[n];
            for (int i = 0; i < n; ++i) a[i] = f();
            return a;
        }

        public char[] Char(int n) { return enumerate(n, Char); }
        public string[] Scan(int n) { return enumerate(n, Scan); }
        public double[] Double(int n) { return enumerate(n, Double); }
        public int[] Integer(int n) { return enumerate(n, Integer); }
        public long[] Long(int n) { return enumerate(n, Long); }
    }
}
#endregion
#region Matrix
public class Matrix
{
    int row, col;
    public double[] mat;
    public double this[int r, int c]
    {
        get { return mat[r * col + c]; }
        set { mat[r * col + c] = value; }
    }
    public Matrix(int r, int c)
    {
        if ((r & 1) == 1) r++;
        if ((c & 1) == 1) c++;
        row = r; col = c;
        mat = new double[row * col];
    }
    public static Matrix operator +(Matrix l, Matrix r)
    {
        check(l, r);
        var ret = new Matrix(l.row, l.col);
        for (int i = 0; i < l.row; i++)
            for (int j = 0; j < l.col; j++)
                ret.mat[i * ret.col + j] = l.mat[i * l.col + j] + r.mat[i * r.col + j];
        return ret;

    }
    public static Matrix operator *(Matrix l, Matrix r)
    {
        var ret = new Matrix(l.row, l.col);
        for (int i = 0; i < l.row; i++)
            for (int k = 0; k < l.row; k++)
                for (int j = 0; j < l.col; j++)
                    ret.mat[i * l.col + j] = (ret.mat[i * l.col + j] +
                        l.mat[i * l.col + k] * r.mat[k * l.col + j]
                        );
        return ret;
    }
    static Matrix[] powmat = new Matrix[64];
    public static void otaku(Matrix m)
    {
        powmat[0] = m;
        for (int i = 1; i < 64; i++)
            powmat[i] = powmat[i - 1] * powmat[i - 1];
    }
    public static Matrix Pow(Matrix m, long n)
    {
        var ret = new Matrix(m.row, m.col);
        for (int i = 0; i < m.row; i++)
            ret.mat[i * m.col + i] = 1;
        for (var p = 0; n > 0; n >>= 1, p++)
            if ((n & 1) == 1)
                ret = ret * powmat[p];
        return ret;

    }
    public static Matrix Trans(Matrix m)
    {
        var ret = new Matrix(m.col, m.row);
        for (int i = 0; i < m.row; i++)
            for (int j = 0; j < m.col; j++)
                ret.mat[j * m.col + i] = m.mat[i * m.col + j];
        return ret;
    }
    [System.Diagnostics.Conditional("DEBUG")]
    static private void check(Matrix a, Matrix b)
    {
        if (a.row != b.row || a.col != b.col)
            throw new Exception("row and col have to be same.");

    }
    [System.Diagnostics.Conditional("DEBUG")]
    static private void checkMul(Matrix a, Matrix b)
    {
        if (a.col != b.row)
            throw new Exception("row and col have to be same.");

    }
}
#endregion