static void Main(string[] args)
{
IMaths maths = MathsFactory.CreateMaths();
Console.WriteLine(maths.Addieren(1, 5));
Console.WriteLine(maths.Subtrahieren(10, 9));
IMathsExtended mathsExtended = MathsFactory.CreateMathsExtended();
Console.WriteLine(mathsExtended.Dividieren(12, 3));
Console.WriteLine(mathsExtended.Multiplizieren(9, 4));
IMathsQuadrat mathsQuadrat = MathsFactory.CreateMathsQuadrat();
mathsQuadrat.Quadrieren(5);
Console.ReadKey();
}