conversations.from: human
conversations.value: Gunther can type 160 words every 3 minutes and he works 480 minutes per day. How many words can Gunther type in a working day?
conversations.from: assistant
conversations.value: Gunther can type 480 / 3 = 160 sets of 160 words per 3 minutes.
  Therefore, he can type 160 x 160 = 25,600 words per day.