package P06;

import java.util.Scanner;

public class P03102021UPR6 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int Nylon = Integer.parseInt(scanner.nextLine());
        int Paint = Integer.parseInt(scanner.nextLine());
        int Diluent = Integer.parseInt(scanner.nextLine());
        int Hours = Integer.parseInt(scanner.nextLine());
        double NylonAndtrash = Nylon+2;
        double PriceNylonAndBags = NylonAndtrash*1.5+0.4;
        double PricePaint = Paint*1.1*14.5;
        double PriceDiluent = Diluent*5;
        double PriceTotalMaterials = PriceDiluent+PricePaint+PriceNylonAndBags;
        double PriceWork = Hours*PriceTotalMaterials*0.3;
        double PriceTotal2 = PriceWork+PriceTotalMaterials;
        System.out.println(PriceTotal2);



    }
}