conversations.from: human
conversations.value: Can you walk me through the solution of: Olivia and Nigel are traveling in Asia.  Olivia has $112 and Nigel has $139. If together they buy six one day passes to a tourist attraction for $28 per ticket, how much money do they have left?
conversations.from: assistant
conversations.value: They have 112+139=$251
  The passes cost 6*28=$168
  They have 251-168=$83 left.