public Calculate(Action<Action<double?>> ejectNumber,
Action<Tuple<char, double?>, Action<double>> applyOperation)
{
var opToSignal = new DropData<char>();
var joinOpAndNumber = new Join<char, double?>();
this.In_Process = (c) =>
{
opToSignal.In_Drop(c);
joinOpAndNumber.Input0(c);
};
opToSignal.Out_Signal += () => ejectNumber(joinOpAndNumber.Input1);
joinOpAndNumber.Output += _ => applyOperation(_, this.Out_Result);
}