conversations.from: human
conversations.value: There are 320 ducks in a pond.  On the first night 1/4 of them get eaten by a fox.  On the second night 1/6 of the remaining ducks fly away, and on the third night 30 percent are stolen.  How many ducks remain after the three nights?
  How to solve this?
conversations.from: assistant
conversations.value: First night:320(1/4)=80
  320-80=240
  Second night:240(1/6)=40
  240-40=200
  Third night:200(.30)=60
  200-60=140 ducks remain