Cell Padding Values returned by Stored Procedure are causing issues in GridView

My stored procedure returns rows that include cell padding.   My code is having trouble with the returned value from the SP..
<ItemTemplate>
                        <div style="padding-left: <%# int.Parse(Eval("CellPadding").ToString())*30%>px;" >                             <%# Eval("MemberValue") %>                         < ...