Unit automatic conversion

Hi!

I just started using Mathcad Express Prime 3.0 and I can't understand what's happening to the units that I enter.

For example, if I enter a variable d=370 km, it transforms in d=0.37 1/m^3 * km. I am sure this in some built-in setting that is supposed to help me, but right now it's really problematic for me.

Could someone explain to me what I should do to change this?

Thank you!

Iulia