using System;

public class Program

{

    public static void Main()

    {

                int firstNum;

                int secondNum;                

                string operation;

                int answer;

​

                Console.WriteLine("Welcome to the calculator. Press enter.");

                Console.ReadLine();

​

                Console.Write("Enter the first number in your basic equation: ");

                firstNum = Convert.ToInt32(Console.ReadLine());                             

​

                Console.Write("Enter the second number in the basic equation: ");

                secondNum = Convert.ToInt32(Console.ReadLine());

                Console.Write("Enter the operation ( x , / , +, -): ");

                operation = Console.ReadLine();

​

                if (operation == "x")

                {

                   answer = firstNum * secondNum;

                   Console.WriteLine(firstNum + " x " + secondNum + " = " + answer);

                }

                else if (operation == "/")

                {

                   answer = firstNum / secondNum;

                   Console.WriteLine(firstNum + " / " + secondNum + " = " + answer);

                }                                                                           

                else if (operation == "+")

                {

                   answer = firstNum + secondNum;

                   Console.WriteLine(firstNum + " + " + secondNum + " = " + answer);

                }

                else if (operation == "-")

                {

                   answer = firstNum - secondNum;

                   Console.WriteLine(firstNum + " - " + secondNum + " = " + answer);

                }

                else

                   Console.WriteLine("Sorry that is not correct format! Please restart!");

                Console.ReadLine();

    }

}