conversations.from: human
conversations.value: Harper has 15 rubber bands. His brother has 6 fewer rubber bands than he has. How many rubber bands do they have together?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: His brother has 15 rubber bands - 6 rubber bands = 9 rubber bands.
  They have 15 rubber bands + 9 rubber bands = 24 rubber bands together.