Featuring a unique CD that contains a virtual computer/calculator software program, The Definitive Guide to How Computers Do Math begins by explaining fundamental math concepts, such as the use of powers and different place-value number systems (specifically binary, decimal, and hexadecimal). The book then introduces the concepts of computers and calculators and discusses fundamental concepts such as the stack and the use of subroutines. Readers then use what they have learned to create a set of basic math subroutines for addition, subtraction, multiplication, and division. Finally, these routines are gathered together into a framework program that the authors use to implement a simple four-function calculator.