[CONNECT U14] Item Types math with LookUp.GetEntry

So I am trying to set an Item Type Property Definition to an area of an object and want it to display in acres.  Well, I found that changing the property definition type to a number and units to acres does this quite nice, but one caveat...incoming units are assumed too be sqft.  This is fine, except that the data I'm trying to enter in this definition in certain circumstances comes from a lookup of Excel data that is already in acre format.  Well, I though I could do some math real quick to the expression, but unfortunately, I cannot get it to work.

Has anyone else encountered this issue?

TIA