units in expressions seem broken

[mieczotronix]

I want to compute a radius, which is proportional to a ratio of two angles, say in degrees, e.g.:
new radius = old radius * angle/(360-angle)
But it seems like the expression engine thinks that the unit of angle/(360-angle) is angle and it does not let me assign the whole expression to the new radius.

This seems like an obvious error. Is there a workaround for this?

[jhackney1972 · Accepted solution]

You have to watch your units.  Notice in the last two expression I multiply and divide by 1 degree to maintain units.  This is the formula you asked for, I am not sure how you are using it.  Change the Old_Radius and/or Angle to an value to re-calculate.

[mieczotronix · Accepted solution]

Ok so it turns out my fault was not adding type suffix to constants (i.e. i typed "360" instead of "360 deg").
So, for clarity:
Comp_Angle should be declared as "No Unit" because it's a ratio, so let's name it ratio accordingly:

            ratio = (Angle / (360 deg - Angle)) [No Unit]
then I can multiply mm by it ratio and it works.
            New_Radius = Old_Radius * ratio [mm]
Also I learned I don't have to use cumbersome Alt 0176 (yet another PIN to remember) for entering degrees symbol, one can type "deg" instead.
Thanks for pointing me in the right direction!