conversations.from: human
conversations.value: John can read a book 60% faster than his brother.  If his brother takes 8 hours to read a book, how long would it take John to read 3 books?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: Reading 60% faster means John's brother takes 1+.6=1.6 times as long as John to read
  So John reads a book in 8/1.6=5 hours
  So it would take John 5*3=15 hours to read 3 books