Flawed test? What gears have I?

Or if not stamped divide the number of teeth on the ring gear by the number of teeth on the pinion gear.

41 ring / 10 pinion = 4.10

You can get a sure grip carrier alone or find one as an assembled 3rd member with the gear ratio of your choice. 3.23 is common 3.55 less common and even less common from there.