conversations.from: human
conversations.value: Can you guide me through solving this problem: Last year, the school library purchased 50 new books. This year, it purchased 3 times as many books. If the library had 100 books before it purchased new books last year, how many books are in the library now?
conversations.from: assistant
conversations.value: Last year, there were a total of 100 + 50 = 150 books in the library.
  The library purchased 50 x 3 = 150 books this year.
  Therefore, the library now has a total of 150 + 150 = 300 books.