When typing numbers into the rotation command, why can't you do math?

Support Basics & Interface
1

If I select and object, press R then Z, and type 9 * 4 I get 94º instead of 36º.
If I type 360/8 I get 0.000277º instead of 45º.
If I type 45 + 180 I get 4,5180, sometimes, but other times I get 225º.

What is going on?

2

Simple vs Advanced mode I think is the issue.
https://docs.blender.org/manual/en/latest/scene_layout/object/editing/transform/control/numeric_input.html

3

Thanks. that is some vital information