Math Calculations

I originally posted accidentally under "Corel Connect", instead of "Corel Draw X7." My apologies for any confusion. 

 I make sales drawings for a manufacturer. In these drawings I show both metric and imperial measurements. Example: 27' 8"  [8433]. [ ] brackets are the metric conversion. What I normally do is use a conversion calculator someone made in Excel. I type the distance in Excel, then type the answer in CoreI. I would prefer it if Corel Draw could just do it. Maybe inside the tables tools, and I can hide the border lines.  So as I type the distance in feet and inches, Corel will automatically insert the correct converted metric distance. I tried this with importing a table from Excel into Corel. It did sometimes work, but would Crash Corel constantly. I use Corel Draw Graphics suite X7. Drawings are not to scale, so measurements would be typed in.