Easter Lunch

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int easterBreads = Integer.parseInt(scanner.nextLine()),
                eggPacks = Integer.parseInt(scanner.nextLine()),
                cookies = Integer.parseInt(scanner.nextLine());

        double sum = 3.20 * easterBreads + 4.35 * eggPacks + 5.40 * cookies + 0.15 * 12 * eggPacks;

        System.out.printf("%.2f\n", sum);
    }
}