The following exposition assumes that the numbers are broken into two-digit pieces, separated by commas: e.g. 3456 becomes 34,56.
(So a × b = c.) Note that a1 may not have a leading zero; it should stand alone as a two-digit number.
From then on, the number of terms remains constant, so there is no increase in difficulty.
Once we have as much precision as we need, we use an estimate to place the decimal point.
The general term is In cases where one or more of the b terms has more than two digits, the final quotient value b cannot be constructed simply by concatenating the digit pairs.