using System;

namespace ConsoleApp8
{
    class Program
    {
        static void Main(string[] args)
        {
            double lengthSide = 120;
            double widthSide = 70;

            double length = double.Parse(Console.ReadLine());
            double width = double.Parse(Console.ReadLine());

            double areaLengtWorkplace = Math.Round((length* 100)/ lengthSide);
            double areaWidthWorkplace = Math.Round((width *100 -100) / widthSide);
            double workplaceCount = areaLengtWorkplace * areaWidthWorkplace -3;

            Console.WriteLine(workplaceCount);
        }
    }
}