using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PavasarisPirmaPaskaita
{
    class Program
    {
        static void Main(string[] args)
        {
            var sand = 1;
            for (int i = 1; i < 100; i++)
            {
            if(i % 7 == 0)
                {
                    sand *= i;
                }
            }
            Console.WriteLine(sand);
            Console.ReadLine();
        }
    }
}