using System;

public class Program

{

    public static void Main (string [] args)

    {

        do

        {

            Console.Write("-----------");

            Console.Write("CALCULATOR");

            Console.WriteLine("-----------");

            Console.WriteLine();

            //addition

            Console.WriteLine("ADDITION");

            Console.Write("x= ");

            string str = Console.ReadLine();

            int x = Convert.ToInt32(str);

            Console.Write("y= ");

            int y = Convert.ToInt32(Console.ReadLine());

            int sum =  x + y;

            Console.WriteLine("Result: {0} ", sum);

            Console.WriteLine();

            //subtraction

            Console.WriteLine("SUBTRACTION");

            Console.Write("x= ");

            string txt  = Console.ReadLine();

            int a = Convert.ToInt32(txt);

            Console.Write("y= ");

            int b = Convert.ToInt32(Console.ReadLine());

            int result = a-b;

            Console.WriteLine("Result: {0} ", result);

            Console.WriteLine();

            //multiplication

            Console.WriteLine("MULTIPLICATION");

            Console.Write("x= ");

            string text = Console.ReadLine();

            int c = Convert.ToInt32(text);

            Console.Write("y= ");

            int d = Convert.ToInt32(Console.ReadLine());

            int answer = a*b;

            Console.WriteLine("Result: {0}", answer);

            Console.WriteLine();

            //division

            Console.WriteLine("DIVISION");

            Console.Write("x= ");

            string texts = Console.ReadLine();

            int e = Convert.ToInt32(texts);

            Console.Write("y= ");

            int f = Convert.ToInt32(Console.ReadLine());

            int answers = e/f;

            Console.WriteLine("Result: {0}", answers);

            break;

        }

        while (true);

    }

}