conversations.from: human
conversations.value: Can you walk me through the solution of: Jack decides to visit a museum 150 miles from home.  He drives 75 mph there and back.  He spends 6 hours at the museum.  How long is he gone from home?
conversations.from: assistant
conversations.value: He drove a total of 150+150=300 miles
  So he drove for 300/75=4 hours
  That means he was gone from home for 4+6=10 hours