John is a hack author. He writes a book every 2 months. He has been writing for 20 years and has earned an average of $30,000 per book. How much money has he made writing? Let's be accurate as possible.
He writes 12 / 2 = 6 books a year. That means he has written 6 * 20 = 120 books. So he has made 120 * 30,000 = $3,600,000 from writing.
The answer: 3600000.