Calculator

namespace Homework2
{
    using System;

    public class Problem
    {
        public static void Main()
        {
            int num1 = int.Parse(Console.ReadLine());
            string operation = Console.ReadLine();
            int num2 = int.Parse(Console.ReadLine());
            int result = 0;

            switch (operation)
            {
                case "+":
                    result += num1 + num2;
                    break;
                case "-":
                    result += num1 - num2;
                    break;
                case "*":
                    result += num1 * num2;
                    break;
                case "/":
                    result += num1 / num2;
                    break;
            }

            Console.WriteLine(num1 + " " + operation + " " + num2 + " = " + result);
        }
    }
}