double cenaPacetHimikali = 5.80;
double cenaPaketMarkeri = 7.20;
double cenaPrparat = 1.20;

int himikali = int.Parse(Console.ReadLine());
int markeri = int.Parse(Console.ReadLine());
int prparat = int.Parse(Console.ReadLine());
int otstupka = int.Parse(Console.ReadLine());

double cena = cenaPacetHimikali * himikali + cenaPaketMarkeri * markeri + cenaPrparat * prparat;
double cena2 = (otstupka / 100) * cena ;
double cena3 = cena - cena2;

Console.WriteLine(cena3);