By using this site, you are accepting "session" cookies, as set out in the site's Privacy Policy
Cookies are also used to remember which page of the book you last viewed, so that when you revisit the site you automatically return to the last page you visited.
You have been multiplying allof each successive product by 8. That is wrong: you multiply the fractional part only (the part to the right of the decimal point). Here is what you must have done:
