conversations.from: human
conversations.value: Three companies, A, B, and C, each purchased 10 ad spaces on a newspaper, with each ad space having a size of 12 foot by 5-foot rectangle. If each square foot ad was charged at $60, how much money did the three pay for the ads combined?
  Can you solve this problem?
conversations.from: assistant
conversations.value: A size 12 foot by 5-foot rectangle ad takes 12*5 = 60 square feet since the area of a rectangle is l*w.
  If each company bought 10 ad spaces, the total area that their ads took is 60*10 = 600 square feet.
  If each square foot of ad space was charged at $60, 600 square feet of ads cost $60*600 = $36000
  If all three companies each purchased an equal number of ad space, together they paid $36000*3 = $108000