conversations.from: human
conversations.value: There were some snowflakes at first. It snowed an additional 4 snowflakes every 5 minutes. If there were 58 snowflakes after 1 hour, how many snowflakes were there at first?
  Can you solve this problem?
conversations.from: assistant
conversations.value: There are 60/5=12 5-minute intervals in 1 hour.
  12*4=48 snowflakes fell in 1 hour.
  There were 58-48=10 snowflakes at first.