using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("ใส่เลข 0-9");

        int num = int.Parse(Console.ReadLine());

        switch(num)

        {

            case 1: case 2: case 3:

                Console.WriteLine(num*10);

                break;

            case 4: case 5: case 6:

                Console.WriteLine(num*100);

                break;

            case 7: case 8: case 9:

                Console.WriteLine(num*1000);

                break;

        }

    }

}