Subject heading

Topic

The function div(a,b) divides 3/7 and returns the result, 0.42857142857142855
The function precision rounds this result to
the required number of decimal places (e.g. 3) to give 0.429

In the second half of this test the variable answer has been assigned to
the function div. It now takes on the role of this function
and is applied directly to the function precision to give the same result as before