static void Main(string[] args)
{
Gra go = new Gra();
string h = Console.ReadLine();
go = OperationFactory.createOperate(h);
string lz = Console.ReadLine();
go.L = Convert.ToDouble(lz);
string wd = Console.ReadLine();
go.W = Convert.ToDouble(wd);
double result = go.GetResult();
Console.WriteLine("结果是：" + result);
}