conversations.from: human
conversations.value: Can you walk me through the solution of: Joe’s mother gave him $56 to go to the store. Joe bought 7 notebooks and 2 books. Each notebook costs $4 and each book costs $7. How much money does Joe have left?
conversations.from: assistant
conversations.value: 7 notebooks cost 7 notebooks x $4/notebook = $28
  2 books cost 2 books x $7/book = $14
  In total Joe has spent $28 + $14 = $42
  He has $56 - $42 = $14 left