Var[]..[] output to double?

Newby here.
I accidently put in a load of topography points in mm rather than metres. Dynamo could fix that!

I have the points (Topography.Points) and have extracted the x,y and z points -
Multiplied the z coords by 1000 and plugged it all into Point.ByCoordinates.

The problem is the * function returns var , not double which Point.ByCoordinates requires.

Is there a function to turn it into double?