[OS-webwork] Subset and Iterator tags

[Rich]

Let's say I had something like below:   What this is trying to do is display images. I would like it to display only a certain amount per row, defined by the variable "maxThumbsPerRow". I figured the best way to do this would be to check if "@status/index" divided by "maxThumbsPerRow" is equal to 0. If this is true, just add a line break. I'm just not sure how or if I can do the division in the "<ww:if" tag. Can I do it this way? Or is there an easier way and I'm just trying to do it the complicated way?   <ww:subset source="album/images" start="begin" count="total" />     <ww:iterator status="'status'">         Display stuff.             <ww:if test=             <br>         </ww:if>     </ww:iterator> </ww:subset>