prompt: Matt can buy key chains in packs of 10 for $20 or in packs of 4 for $12. How much money can he save if he chooses to buy 20 key chains at a lower price?
messages.content: Matt can buy key chains in packs of 10 for $20 or in packs of 4 for $12. How much money can he save if he chooses to buy 20 key chains at a lower price?
messages.role: user
messages.content: The cost of each key chain in packs of 10 for $20 is $20/10=$<<20/10=2>>2.
  The cost of each key chain in packs of 4 for $12 is $12/4=$<<12/4=3>>3.
  There is a price difference of $3-$2=$<<3-2=1>>1 per key chain between the two choices.
  By buying 20 key chains at a lower price, Matt can save 20x$1=$<<20*1=20>>20.
  #### 20
messages.role: assistant