How do I do a round(length) variable within a xdoxslt in RTF Template?

I'm trying to create an RTF template that will fill the page based on a dynamic number of rows. Which I have done except for factoring in the text wrap for my description coloumn.  In order to do that I'm counting the characters in the ITEM_DESCRIPTION xml tag and dividing that by the number of characters allowed in the column length.  I'm able to do that and get a value but I'm not able to combine it with the other variable I'm using to set how many rows the row takes up of my remaining rows to fill the page.