conversations.from: human
conversations.value: John buys 1.5 ounces of silver and twice as much gold.  The silver costs $20 per ounce.  The gold is 50 times more expensive per ounce.  How much does he spend on everything?
  Can you solve this problem?
conversations.from: assistant
conversations.value: He buys the silver for 1.5*$20=$30
  He bought 1.5*2=3 ounces of gold
  The gold is worth %20*50=$1000 per ounce
  So he buys 3*$1000=$3000 on gold
  So he spent $30+$3000=$3030 on everything