using System;

public class Program

{

    public static void Main()

    {

        float zero = 0;

        float infinity = 1 / zero;

        Console.WriteLine("1 / 0 = " + (1 / zero));

        Console.WriteLine("Infinity - Infinity = " + (infinity - infinity));

        Console.WriteLine("1 / Infinity = " + (1 / infinity));

        Console.WriteLine("-1 * Infinity = " + (-1 * infinity));

    }

}