public static void Main()
int n = int.Parse(Console.ReadLine());
int ft = int.Parse(Console.ReadLine());
int ff = int.Parse(Console.ReadLine());
int ut = int.Parse(Console.ReadLine());
int filteringTime = n * ft;
double percentageUpld = ff/100.00;
int uploadedPics = (int)(Math.Ceiling(percentageUpld * n));
int uploadTime = uploadedPics * ut;
int totalTime = filteringTime + uploadTime;