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

namespace _19.Thea_The_Photographer
{
    class Program
    {
        static void Main(string[] args)
        {
            int picturesTaken = int.Parse(Console.ReadLine());
            int filterTimePerPicture = int.Parse(Console.ReadLine());
            int percentage = int.Parse(Console.ReadLine());
            int uploadTimePerPicture = int.Parse(Console.ReadLine());
            if ((picturesTaken >= 0 && picturesTaken <= 1000000) &&
               (filterTimePerPicture >= 0 && filterTimePerPicture <= 100000) &&
               (percentage >= 0 && percentage <= 100) &&
               (uploadTimePerPicture >= 0 && uploadTimePerPicture <= 100000))
            {

                int timeToFilterInSeconds = picturesTaken * filterTimePerPicture;
                double totalPictures = Math.Ceiling((picturesTaken * (percentage * 0.01)));
                int TimeToUpload = (int)totalPictures * uploadTimePerPicture + timeToFilterInSeconds;

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