Dance

double lengt = double.Parse(Console.ReadLine());
            double width = double.Parse(Console.ReadLine());
            double wardrobside = double.Parse(Console.ReadLine());

            double areaHall = (lengt * 100) * (width * 100);
            double areaWardrob = (wardrobside * 100) * (wardrobside * 100);
            double areaBench = areaHall / 10;
            double freeSpace = areaHall - areaWardrob - areaBench;

            double countPeople = freeSpace / 7040;
            Console.WriteLine(Math.Floor (countPeople));