That is correct
Block the other side
Chalk mark both axle and wheel
And you will get 2x the normal turns on one wheel with the other blocked

Example
I block one wheel on my truck
Make 10 turns on the wheel and see about 25.5 turns of the input shaft
10/2 = 5 turns of both wheel if I was on the road
25.5/5 = 5.1 so that’s a 5.13 according to the books
-s