conversations.from: human
conversations.value: Jennie is helping at her mom's office. She has a pile of 60 letters needing stamps, and a pile of letters already stamped. She puts stamps on one-third of the letters needing stamps. If there are now 30 letters in the pile of already-stamped letters, how many were in that pile when Jennie began?
  Solve this problem.
conversations.from: assistant
conversations.value: She stamped 60/3=20 letters.
  Then there were 30-20=10 in the already-stamped pile to begin with.