conversations.from: human
conversations.value: This math problem has got me stumped: Bob drove for one and a half hours at 60/mph.  He then hit construction and drove for 2 hours at 45/mph. How many miles did Bob travel in those 3 and a half hours?
  Can you show me the way?
conversations.from: assistant
conversations.value: Bob drove for 1.5 hour * 60/mph = 90 miles.
  Bod drove for 2 hour * 45/mph = 90 miles.
  In total Bob drove 90 + 90 miles = 180 miles.