Simple beam - Rhino canvass in mm and karamba in MKS

Hello everybody,

I designed a line (my beam) using the unit of measurement as mm, I would analyze a single beam (line) of  4177mm in MKS system.

I want all the karamba data to remain in meters and Newtons, but the lines are in mm: karamba thinks we have meters. How can I solve it? Greetings.

Tnks