using System;

public class Program

{

    public static void Main()

    {

        int result = 1;

        for(int i=1; i<=20; i++)

        {

            Console.WriteLine("---> " + i + " - " + result );

            int j = 2;

            int tmpresult = result;

            while(tmpresult % i != 0)

            {

                tmpresult=result * j;

                Console.WriteLine("         -> " + j + " - " + tmpresult );

                j++;

            }

            result = tmpresult;

            Console.WriteLine("---> " + i + " - " + result );

        }

        Console.WriteLine("-> " + result );

    }

}