using System;

public class Program

{

    public static void Main()

    {

         int x;

        do

        {

            Console.Write("Enter a number(0 to exit): ");

            x = Convert.ToInt32(Console.ReadLine());

            if (x != 0)

            {

                Console.WriteLine(10 * x);

            }

        } while (x != 0);

    }

}