static void Main(string[] args)
{
MathsOperationsClient maths = new MathsOperationsClient();
Console.WriteLine(maths.Add(5, 8));
Console.WriteLine(maths.Multiply(40, -985));
Console.WriteLine(maths.Divide(0, 2));
Console.WriteLine(maths.Substract(1, 999));
Console.ReadKey();
}