04. Vegetable Market

using System;

namespace Farm
{
    class Program
    {
        static void Main(string[] args)
        {

            double vegetablesBg = double.Parse(Console.ReadLine());
            double fruitsBg = double.Parse(Console.ReadLine());
            double vegetablesKg = double.Parse(Console.ReadLine());
            double fruitsKg = double.Parse(Console.ReadLine());
            double results =(((vegetablesBg * vegetablesKg) + (fruitsBg * fruitsKg)) / 1.94);
            Console.WriteLine($"{results:f2}");
        }

    }
}