using System;

namespace rumen
{
    class Program
    {
        static void Main(string[] args)
        {
            double nailon = double.Parse(Console.ReadLine());
            double boq = double.Parse(Console.ReadLine());
            double razreditel = double.Parse(Console.ReadLine());
            double chas = double.Parse(Console.ReadLine());

            double nailonprice = (nailon + 2)* 1.5;
            double boqprice = (boq + boq * 0.1) * 14.50;
            double razreditelprice = razreditel * 5.00;
            double sum = nailonprice + boqprice + razreditelprice + 0.40;


            double maistora = (sum * 0.3) * chas;
            double vsichko = maistora + sum;
            Console.WriteLine(vsichko);
        }
    }
}