04. Vegetable Market

import java.util.Scanner;

public class VegetableMarket {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double vegetablesBg = Double.parseDouble(scanner.nextLine());
        double fruitsBg = Double.parseDouble(scanner.nextLine());
        double vegetablesKg = Double.parseDouble(scanner.nextLine());
        double fruitsKg = Double.parseDouble(scanner.nextLine());

        double result =(((vegetablesBg * vegetablesKg) + (fruitsBg * fruitsKg)) / 1.94);

        System.out.printf("%.2f", result);
    }
}