using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("First number ") ;

        string sNumber1 = Console.ReadLine ();

        int Number1 = int.Parse(sNumber1) ;

        Console.WriteLine("Second number ") ;

        string sNumber2= Console.ReadLine ();

        int Number2 = int.Parse(sNumber2) ;

        int Answer = Number1 + Number2;

        Console.Write("By addition the sum equals: " + Answer);

​

        int Answer2 = Number1 - Number2;

        Console.Write("By subtraction the sum equals: " + Answer2);

        int Answer3 = Number1 * Number2;

        Console.Write("By multiplication the sum equals: " + Answer3);

        int Answer4 = Number1 / Number2;

        Console.Write("By division the sum equals " + Answer4);

    }

}