conversations.from: human
conversations.value: Break down this math problem: Elizabeth wants to buy the steak knives from a bridal registry as a wedding gift.  The couple registered for 2 steak knife sets and each set contains 4 steak knives.  If Elizabeth buys both sets and they cost $80.00 per set, how much does each single steak knife cost?
conversations.from: assistant
conversations.value: Each steak knife set has 4 steak knives and Elizabeth bought 2 sets so there are 4*2 = 8 steak knives in total
  Each steak knife set costs $80.00 and she bought 2 sets so she spent $80*2 = $160.00
  Both sets cost $160.00 and there are 8 knives in total so each knife costs 160/8 = $20.00 each