\begin{definition}[Definition:Prosthaphaeresis]
'''Prosthaphaeresis''' is the process whereby multiplication and division are performed by:
:$(1): \quad$ converting the numbers into a form where they can be added or subtracted
:$(2): \quad$ performing the addition or subtraction
:$(3): \quad$ converting the result back again, using the inverse process to step $(1)$.
\end{definition}