Simple Calculator

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace calculator
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("**** Simple Calculator ****");
            // 1st number
            Console.WriteLine("Enter first number");
            int num1 = Convert.ToInt16(Console.ReadLine());
            // second number
            Console.WriteLine("Enter second number");
            int num2 = Convert.ToInt16(Console.ReadLine());
            // operations
            Console.WriteLine("Enter operation");
            string opt = Console.ReadLine();
            int result = 0;
            // if condition
            if (opt ==  "+")
            {
                result = num1 + num2;
            }
            else if (opt == "-")
            {
                result = num1 - num2;
            }
            else if (opt == "*")
            {
                result = num1 * num2;
            }
            else if (opt == "/")
            {
                result = num1 / num2;
            }
            Console.WriteLine("The result is ***   " + result);
            Console.ReadLine();
        }
    }
}