Give the step-by-step reasoning process and then the final answer. Steve decides to read a new book. He reads 100 pages Monday, Wed, and Friday. The book is 2100 pages long. How many weeks does it take to read them all?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
He reads 100 * 3 = 300 pages a week. So it would take 2100 / 300 = 7 weeks to read the book.
The final answer: 7.