#nullable enable

#region
var (_input, _iter) = (Array.Empty<string>(), 0);
T I<T>() where T : IParsable<T>
{
    while (_iter >= _input.Length) (_input, _iter) = (Console.ReadLine()!.Trim().Split(' '), 0);
    return T.Parse(_input[_iter++], null);
}
#endregion

static T[] Range<T>(int n, Func<T> F) => Enumerable.Range(0, n).Select(_ => F()).ToArray();

static long GCD(long x, long y) => y == 0 ? x : GCD(y, x % y);

long Solve()
{
    var n = I<int>();
    var az = Range(n, I<long>);
    var ans = 1L;
    for (var i = 1; i < n; i++)
    {
        var v = 1L;
        var a = az[i];
        if (a == 0) continue;
        while (v <= a) v *= 10;
        while (a % 2 == 0)
        {
            v /= 2;
            a /= 2;
        }
        while (a % 5 == 0)
        {
            v /= 5;
            a /= 5;
        }
        var gcd = GCD(ans, v);
        ans = ans / gcd * v;
    }
    return ans;
}

var t = I<int>();
var ans = Range(t, Solve);
Console.WriteLine(string.Join(Environment.NewLine, ans));