conversations.from: human
conversations.value: John pays for a candy bar with 4 quarters, 3 dimes, and a nickel.  He got 4 cents back in change.  How many cents did the candy bar cost?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: The quarters came to 4*25=100 cents
  The dimes were worth 3*10=30 cents
  The nickel was 5*1=5 cents
  So he paid 100+30+5=135 cents
  Since he got 4 cents as change it cost 135-4=131 cents