using System;

public class Program

{

    public static void Main()

    {

        double n1,n2,res; //result

        char op;

        Console.Write("Enter first number: ");

        n1 = double.Parse(Console.ReadLine());

        Console.Write("Enter second number: ");

        n2 = double.Parse(Console.ReadLine());

        Console.Write("Enter operator: ");

        op = char.Parse(Console.ReadLine());

        switch (op)

        {

            case '+':

                res = n1+n2;

                Console.Write("{0} {1} {2} = {3}",n1,op,n2,res);

                break;

            case '-':

                res = n1-n2;

                Console.Write("{0} {1} {2} = {3}",n1,op,n2,res);

                break;

            case '*':

                res = n1*n2;

                Console.Write("{0} {1} {2} = {3}",n1,op,n2,res);

                break;

            case '/':

                if (n2 != 0)

                {

                    res = n1/n2;

                    Console.Write("{0} {1} {2} = {3}",n1,op,n2,res);

                }

                else

                    Console.Write("You can't divide by 0");

                break;

            default:

                Console.Write("Ilegal operator");

                break;

            }

    }

}