using System;

public class Program

{

    public static void Main()

    {

        try

        {

        Console.WriteLine("Input first number: ");

        double Num1 = Convert.ToDouble(Console.ReadLine());

        Console.WriteLine("Input Operation (/, *, +, -): ");

        string op = (Console.ReadLine());

        Console.WriteLine("Input second number: ");

        double Num2 = Convert.ToDouble(Console.ReadLine());

        if(op == "/")

        {

            double answer = Num1 / Num2;

            Console.WriteLine("Your answer is: " + answer);

        }else if(op == "*")

        {

            double answer = Num1 * Num2;

            Console.WriteLine("Your answer is: " + answer);

        }else if(op == "-")

        {

            double answer = Num1 - Num2;

            Console.WriteLine("Your answer is: " + answer);

        }

        else if(op == "+")

        {

            double answer = Num1 + Num2;

            Console.WriteLine("Your answer is: " + answer);

        }

        }

        catch

        {

        }

    }

}