Thea the Photographer

using System;

class Thea
{
    static void Main(string[] args)
    {
        long numberOfPics = long.Parse(Console.ReadLine());
        long filterTimePic = long.Parse(Console.ReadLine());
        long filterFactor= long.Parse(Console.ReadLine());
        long uploadTimePic = long.Parse(Console.ReadLine());
        long filteredPics = (long)(Math.Ceiling(numberOfPics * filterFactor / 100d));
        long timeToFilterPics = numberOfPics * filterTimePic;
        long timeToUploadPics = filteredPics * uploadTimePic;
        long totalTime = timeToFilterPics + timeToUploadPics;
        TimeSpan time = TimeSpan.FromSeconds(totalTime);
        Console.WriteLine("{0:d\\:hh\\:mm\\:ss}", time);
    }
}