conversations.from: human
conversations.value: Marlon had 42 lollipops in the beginning. On his way home, he saw Emily and gave her 2/3 of his lollipops. Then, Marlon kept 4 lollipops and gave the rest to Lou. How many lollipops did Lou receive?
  How to solve this?
conversations.from: assistant
conversations.value: Marlon gave Emily 42 x 2/3 = 28 lollipops.
  So, he only had 42 - 28 = 14 lollipops left.
  After keeping 4, Marlon gave 14 - 4 = 10 lollipops to Lou.