that explains the issue. I have already tried to set it to lenght and it works.
My original problem was to handle decimal places and with lenght, or any other number with unit I can change it only wit "Calculation units and Rules" setting which changes decimals in whole project.
It would be great to add Operator which will change weather the number is "extensive" or "ntensive" or add Integer operator also for unit values.
Still love these expresions functions, keep up the good work