I have some numeric fields in documents (products) representing product attributes e.g. surface area stored in square feet. Instead of having two fields (like surfaceArea_sqft and surfaceArea_sqm), I would like to perform a calculation in the transformation e.g.

<td><%# Eval("surfaceArea") %> sq ft, <%# Eval("surfaceArea")*0.09290304 %> sq m</td>