using System;

public class Program

{

    public static void Main()

    {

        int h = int.Parse(Console.ReadLine());

        int m = int.Parse(Console.ReadLine());

        int p = int.Parse(Console.ReadLine());

        double n = int.Parse(Console.ReadLine());

        double ch= h*5.80;

        double cm = m*7.20;

        double cp = p*1.20;

        double cvm = ch+cm+cp;

        n = 0.25;

        double csn = cvm-(cvm*n);

        Console.WriteLine(csn);

    }

}