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)
        {

            var pictureCount = int.Parse(Console.ReadLine());
            var singlePictureFilterTimeSeconds = int.Parse(Console.ReadLine());
            var filterPercentage = int.Parse(Console.ReadLine());
            var singlePictureUploadTime = int.Parse(Console.ReadLine());


            var filterTimeSecond = (long)pictureCount * singlePictureFilterTimeSeconds;
            var pictureToUploadCount = (long)Math.Ceiling(pictureCount * (filterPercentage / 100d));
            var uploadTimeSeconds = pictureToUploadCount * singlePictureUploadTime;

            var totalTimeNeededSeconds = filterTimeSecond + uploadTimeSeconds;


            var totalTimeNeededTimeSpan = TimeSpan.FromSeconds(totalTimeNeededSeconds);

            Console.WriteLine($"{totalTimeNeededTimeSpan.ToString(@"d\:hh\:mm\:ss")}");










        }
    }
}