using System;
class Program
{
    static void Main()
    {
        var nPictures = int.Parse(Console.ReadLine());
        var filterSeconds = int.Parse(Console.ReadLine());
        var PercentUseful = int.Parse(Console.ReadLine());
      long secondsUpload = int.Parse(Console.ReadLine());


        var TimeFiltering = nPictures * filterSeconds;
       var nUseful =(int)Math.Ceiling((nPictures * PercentUseful) / 100.0);

        long totalUpload = secondsUpload * nUseful;

        long totalSec = TimeFiltering + totalUpload;
        long days = totalSec / 86400;
        long daysLeft = totalSec % 86400;
        long hours = daysLeft / 3600;
        long hoursLeft = daysLeft % 3600;
        long min = hoursLeft / 60;
        long sec = hoursLeft % 60;


        Console.WriteLine("{0}:{1:D2}:{2:D2}:{3:D2}", days, hours, min, sec);
    }
}