conversations.from: human
conversations.value: Find the answer to this math problem: Working together, four pugs can clean their house in 45 minutes. In how many minutes will 15 pugs working together be able to clean their house?
conversations.from: assistant
conversations.value: If four pugs can clean their house in 45 minutes, one pug will take 4*45 = 180 minutes.
  Since one pug working alone takes 180 minutes to clean the house, fifteen pugs working together will be able to clean their house in 180/15 = 12 minutes