conversations.from: human
conversations.value: The girl scouts earned $30 total from selling delicious cookies. They want to go to the pool. It will cost them $2.50 per person to go and 10 people are going. What is the amount left?
  How to solve this?
conversations.from: assistant
conversations.value: The girls paid $2.50/person * 10 people = $25.
  The girls have $30 - $25 = $5 left.