TEMA

using System; using System.Globalization;

namespace URI1116 { class Program { static void Main(string[] args) { int N = int.Parse(Console.ReadLine());

        for (int i = 0; i < N; i++)
        {
            string[] values = Console.ReadLine().Split(' ');
            int x = int.Parse(values[0]);
            int y = int.Parse(values[1]);

            if (y == 0)
            {
                Console.WriteLine("divisão impossivel");
            }
            else
            {
                double divisao = (double)x / y;
                Console.WriteLine(divisao.ToString("f1", CultureInfo.InvariantCulture));
            }
        }
    }
}

}