conversations.from: human
conversations.value: Find the answer to this math problem: Darlene's car gets 20 miles/gallon. Martha's car gets half as many miles per gallon as Darlene’s car. How many gallons does Martha’s car require to make a 300-mile trip?
conversations.from: assistant
conversations.value: Martha’s car gets 20/2 = 10 miles per gallon.
  Total gallons Martha’s car requires is 300/10 = 30 gallons.