Show all used digits for all fields

It might very well be that invoices have fields with e.g. for 4 digits like e.g. 13.4444 however only two get displayed.

In this case, we have to show the original content as is and not round it to two digits.

Requirement: We have to show all numbers i.e. fields of datatype Amount and Unit Price Amount as is. Indepenedent of specification rules.