Yellow Face's Mathematics Book

About
Yellow Face's weekly advertisements. He'll be advertising everything he find in his dump or basement. Right now he's advertising a Mathematic's Book. Remember most of this is fan-made.

I got the idea because I found his advertisement interesting, at the end there will be a tournament of 'MOST POPULAR YELLOW FACE PRODUCT' of course it's fan-made. This article is made because of it being both a joke and both something I had in mind.

The Object
It's easy and very easy to do. Just follow the instructions and bam you'll already know the answer, well in my calculations you'd only understand 19.70% of the book, so this book is pretty much useless but eh. Anyways you see it's easy as '''π (pi or 3.14). '''So get this book now!

There are a total of 181,035 units (Cambodia's Area) and most of them only contain useless content and very few information example! : See isn't it so useful! Besides, it even tells you how to violate the laws in real life no matter how legitimate or criticizing it is! This book isn't even about math, it's pointless useless unneeded content inside! But for some reason, people still buy it.
 * How to multiply? Jaheishdkwnwkao, just do it the. You find the answer auwniahsnwjwow

Buy now for the price of $1,000,000,000,000,000,000,000,000,000,000,000! Cheap rite?