8. Pet Shop

using System;

namespace PetShop
{
internal class Program
{
    static void Main(string[] args)
    {
        int dogFoodAmount = int.Parse(Console.ReadLine());
        int catFoodAmount = int.Parse(Console.ReadLine());

        double dogFoodPrice = 2.50;
        double catFoodPrice = 4;

        double dogPrice = dogFoodAmount * dogFoodPrice;
        double catPrice = catFoodAmount * catFoodPrice;
        double wholePrice = dogPrice + catPrice;


        Console.WriteLine($"{wholePrice} lv.");
    }
}
}