conversations.from: human
conversations.value: John attends a protest for 4 days.  He then attends a second protest for 25% longer than the first.  How many days did he spend protesting?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: The second protest was 4*.25=1 day longer than the first.
  So the second protest was 4+1=5 days.
  Thus he spent 4+5=9 days protesting.