conversations.from: human
conversations.value: Can you break down the solution for me for this math problem: Toby is reading a book that is 45 pages long. It averages 200 words a page. Toby can read at a rate of 300 words per minute. He has to be at the airport in 60 minutes and plans to leave as soon as he finishes the book. It takes 10 minutes to get to the airport. How many minutes early will Toby be?
conversations.from: assistant
conversations.value: He can read 1.5 pages in a minute because 300 / 200 = 1.5
  It will take 30 minutes to read the book because 45 / 1.5 = 30
  He will arrive at the airport 40 minutes from now because 30 + 10 = 40
  He will be 20 minutes early because 60 - 40 = 20