static void Main(string[] args)
{
double volume;
Box Box1 = new Box();
Box Box2 = new Box();
Box1.setLength(10.0);
Box1.setBreadth(10.0);
System.Console.WriteLine(Box1.displayLength());
Box2.setLength(13.12);
Box2.setBreadth(77.9);
volume = Box1.Calc();
System.Console.WriteLine(volume);
}