using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CherryJars
{
    class Program
    {
        static void Main(string[] args)
        {
            double compoteJarsWanted = double.Parse(Console.ReadLine());
            double jamJarsWanted = double.Parse(Console.ReadLine());

            double jarsCompote = compoteJarsWanted + 1;
            double jarsJam = jamJarsWanted + 1;

            double cherryesCompote = jarsCompote * 0.300;
            double cherryesJam = jarsJam * 0.650;

            double cherryC = cherryesCompote + (cherryesCompote * 0.05);
            double cherryJ = cherryesJam + (cherryesJam * 0.1);

            double total = (cherryC + cherryJ) * 3.2;
            Console.WriteLine($"{total:f2}");
        }
    }
}