using System;
namespace problem19TheaThePhotographer
{
    class Problem19TheaThePhotographer
    {
        static void Main()
        {
            long pictures = long.Parse(Console.ReadLine());
            long timeForFilter = long.Parse(Console.ReadLine());
            long percentGodPictures = long.Parse(Console.ReadLine());
            long timeForUpload = long.Parse(Console.ReadLine());

            long filterTime = pictures * timeForFilter;
            long godPictures = (long)Math.Ceiling(pictures * (percentGodPictures / 100.0));
            long timeUplouding = godPictures * timeForUpload;
            long totaltime = filterTime + timeUplouding;

            TimeSpan time = TimeSpan.FromSeconds(totaltime);
            string result = time.ToString(@"d\:hh\:mm\:ss");
            Console.WriteLine(result);
        }
    }
}