08. Pet Shop

import java.util.Scanner;

public class PetShop {
    public static void main(String[] args) {

        Scanner scanner = new Scanner (System.in);
        double MyDogs = Double.parseDouble(scanner.nextLine());
        double HisPets= Double.parseDouble(scanner.nextLine());

        double result1 = MyDogs*2.50;
        double result2 = HisPets*4.00;
        double result3 = result1+result2;

        System.out.println(result3+ " lv");

    }
}