using System;

namespace MyApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
            double w = double.Parse(Console.ReadLine());
            double h = double.Parse(Console.ReadLine());
            double smW = (w * 100);
            double smH = ((h * 100) - 100);
            int placeW = Convert.ToInt32(smW / 120);
            int placeH = Convert.ToInt32(smH / 70);
            double allPlace = (placeH * placeW) - 3;
            Console.WriteLine(allPlace);

        }
    }
}