using System;

namespace OJcsharp
{
    class Program
    {
        static void Main(string[] args)
        {
            string x=Console.ReadLine();
            char []t=x.ToCharArray();
            string tx = "0";
            for (int n = 0; n < x.Length - 3; n++)
            {
                tx += t[n];
            }
            long kei = long.Parse(tx);
            long waru = long.Parse(Console.ReadLine());
            kei = (kei - kei % waru) / waru;
            Console.WriteLine(kei + "000");
        }
    }
}