conversations.from: human
conversations.value: A library has a number of books. 35% of them are intended for children and 104 of them are for adults. How many books are in the library?
  Work out the solution step by step.
conversations.from: assistant
conversations.value: 65% of the library books are for adults because 100 - 35 = 65
  There are 160 library books in total because 104 / .65 = 160