conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: Gary has 30 grams of gold that cost $15 per gram. Anna has 50 grams of gold for the cost of $20 per gram. How much is the cost of their gold combined?
conversations.from: assistant
conversations.value: The cost of Gary’s gold is 30 * $15 = $450.
  The cost of Anna’s gold is 50 * $20 = $1000.
  The total cost of their gold is $450 + $1000 = $1450.