4. Zoo Shop

import java.util.Scanner;

public class ZooShop_04 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int countDogs = Integer.parseInt(scanner.nextLine());
        int countOthers = Integer.parseInt(scanner.nextLine());

        //разходи = бр. кучета * 2.50 + бр. останалите * 4
        double expenses = (countDogs * 2.50) + (countOthers * 4);
       // System.out.printf("%f lv.", expenses);
        System.out.println(expenses + " lv.");
    }
}