Question

The roman cubitus is an ancient unit of measure equivalent to 0.554m . Convert 2.22/m height of basketball forward to cubiti

Answer 1

Your value for a Roman cubitus is incorrect. It is actually equivalent to 0.445m not 0.554m. 

The answer to your question is 4.99cubiti or 5 cubiti (if rouded-off).

Here is why:

$2.22m * \frac{1cubitus}{0.445m} \\ =\frac{2.22cubiti}{0.445} \\ 4.99cubiti$

If you round-off your answer then your answer will be 5 cubiti.