And then it goes on to illustrate that 17 * 6 is the same as 6 (10+7).
Well, of course it is, because that's how long-hand multiplication works, and why the hell didn't anybody ever point that out to me before?
I swear. It's like they're afraid this might make sense to people if they explained how it worked, or something.
In other news, still can't do arithmetic. ;-)