While programmers today take multiplication for granted, most microprocessors in the 1970s could only add and subtract — multiplication required a slow and tedious loop implemented in assembly code.
Ken Shirriff explains the multiplication process inside the 8086, analyzes the microcode that it used, and discusses the hardware circuitry that helped it out. Analysis is based on reverse-engineering the 8086 from die photos. post 
This page is a tutorial on how iconic container numbers work. page
"Intel Inside" page