using System;

public class Calculator

{

    public int result1,result2,result3,result4;

    public int Add(int num1, int num2)

   {

       result1 = num1 + num2;

       return result1;

   }

    public int sub(int num1, int num2)

   {

       result2 = num1 - num2;

       return result2;

   }

     public int mul(int num1, int num2)

   {

       result3 = num1 * num2;

       return result3;

   }

     public int div(int num1, int num2)

   {

       result4 = num1 / num2;

       return result4;

   }

} public class Program

{

  public static void Main(string[] args)

  {

    Calculator calc = new Calculator();

    calc.result1 = calc.Add(1,2);

    calc.result2 = calc.sub(5,1);

    calc.result3 = calc.mul(4,3);

    calc.result4 = calc.div(8,2);

    Console.WriteLine("Addition :" + calc.result1);

    Console.WriteLine("Subtraction :" + calc.result2);

    Console.WriteLine("Multiplication :" + calc.result3);

    Console.WriteLine("Division :" + calc.result4);

  }

}