conversations.from: human
conversations.value: Jessica wrote a long letter to her aunt and needed to put stamps on it to mail it. She used eight pieces of paper that weigh 1/5 of an ounce each, and her envelope weighs 2/5 of an ounce. She needed one stamp per ounce. How many stamps did Jessica need to mail her letter?
conversations.from: assistant
conversations.value: Jessica’s papers weigh 8 * 1/5 = 8/5 ounces.
  The papers in the envelope weigh 8/5 + 2/5 = 10/5 = 2 ounces.
  Thus, Jessica needs 2 * 1 = 2 stamps to mail her letter.