$($b$)$ State whether the solution uses the scaffold algorithm or the traditional, compressed algorithm.

$?$

$(\frac{729}{21}),$

$-63,3(21)$

$?,$

$-,84,4(21)$

$??,$

scaffold algorithm

traditional, compressed algorithm

Fill in the missing numbers in the solution.

Find the quotient. $($If there is no remainder, so indicate by entering $0.)$