Bricks

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

namespace Bricks
{
    class Program
    {
        static void Main(string[] args)
        {
            int bricks = int.Parse(Console.ReadLine());
            int workers = int.Parse(Console.ReadLine());
            double volume = double.Parse(Console.ReadLine());
            var res = Math.Ceiling(bricks / (workers * volume));
            Console.WriteLine(res);
        }
    }
}