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

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new long[t];
        for (var u = 0; u < t; ++u)
        {
            var n = NN;
            var a = NList;
            ans[u] = Dec(n, a);
        }
        WriteLine(string.Join("\n", ans));
    }
    static long Dec(int n, int[] a)
    {
        var ans = 1L;
        for (var i = 1; i < n; ++i)
        {
            if (a[i] == 0) continue;
            var mul = 1L;
            while (mul <= a[i]) mul *= 10;
            var gcd = GCD(mul, a[i]);
            mul /= gcd;
            gcd = GCD(mul, ans);
            WriteLine($"{ans} / {gcd} * {mul}");
            ans = ans / gcd * mul;
        }
        return ans;
    }
    static long GCD(long a, long b)
    {
        if (a < b) return GCD(b, a);
        if (a % b == 0) return b;
        return GCD(b, a % b);
    }
}