using System;

public class Program

{

    public static void Main()

    {

        int num1 = getNumber("Please enter number 1", "Number 1");

        int num2 = getNumber("Please enter number 2", "Number 2");

        int surface = num1*num2;

        int circumference = 2*(num1+num2);

        Console.WriteLine("Surface is "+surface);

        Console.WriteLine("Circumference is "+circumference);

    }

    private static int getNumber(string in_requestmessage, string in_confirmmessage)

    {

        int res;

        Console.WriteLine(in_requestmessage);

        while (1==1)

        {

            string s = Console.ReadLine();

            if (int.TryParse(s, out res))

            {

                Console.WriteLine(in_confirmmessage+" is "+res);

                return res;

            }

            Console.WriteLine("That is not a valid number. Please try again");

        }

    }

}