Training Lab

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

namespace Aula
{
    class Program
    {
        static void Main(string[] args)
        {
            double w = double.Parse(Console.ReadLine());
            if (w < 3 || w >= 100)
            {
                Console.WriteLine("Invalid Number");
            }
            double h = double.Parse(Console.ReadLine());
            if (h <= 3 || h > 100)
            {
                Console.WriteLine("Invalid Number");
            }
            else if (h > w)
            {
                Console.WriteLine("Invalid Number");
            }

            var row = Math.Floor(w / 1.2);
            var col = Math.Floor((h - 1) / 0.7);
            double seats = row * col - 3;
            Console.WriteLine(seats);
        }
    }
}