using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    // static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new long[t];
        var mod = 1_000_000_007;
        for (var u = 0; u < t; ++u)
        {
            var n = NN;
            var a = NList.ToList();
            while (a.Count > 1)
            {
                var va = a[^1];
                var vb = a[^2];
                a.RemoveAt(a.Count - 1);
                a.RemoveAt(a.Count - 1);
                a.Add((va * vb + va + vb) % mod);
            }
            ans[u] = a[0];
        }
        WriteLine(string.Join("\n", ans));
    }
}