Need a Crystla report code to split a quantity into multiple labels

I have the quantity field and quantity per box field pulling into my 4 up label report but don't know how to write the code to print the corect # of labels if it will be more than one box.

Are you calling the rpt from an application?
Because, in my opinion, it would be easier to develop a small routine to generate and save the labels in a table and then after that just call the rpt that will print the rows