Been a long time since I said anything here, and I and my Nippon HL-21 are parted for a few weeks, so I’ll talk algorithms for a while. Thus far we’ve seen addition, subtraction, and multiplication. The missing operation is division. Now, we’re going to start with “fourth-grade” division: the sort where you divide one whole number by another whole number and get a remainder. Later we’ll talk about decimals.

To start with, we might look at what integer division means, and how we do it by hand; the latter will inform our design of algorithms. Let’s suppose we want to divide, say, 52301 by 13.