It's common to use the asterisk '*' to mean multiplication. If you need to square a number, maybe '50', you say '50*50'.
If there's more, you keep doing that, maybe to multiply what you got by Pi, you would add '*3.14' to your formula to get the area in square units of some circle.
This doesn't work, here on SOL. If you want something in bold you surround it by those same asterisks again....
So, instead of my formula looking like '50 times 50 times Pi' what got shown on the screen was '50503.14' which makes no sense to anyone unless you know what happened. I have re-posted Chapter 16 using 'x' instead of '*'.
Oh, and I fixed a minor continuity error I saw. I think I'm paying my proofreaders too much.
-ZM