conversations.from: human
conversations.value: Can you walk me through the solution of: Michael loves to paint and sells his creations. He charges $100 for a large painting and $80 for a small painting. At his last art show, he sold 5 large paintings and 8 small paintings. How much did he earn in all?
conversations.from: assistant
conversations.value: He earned 5 x $100 = $500 for the large painting.
  And he earned 8 x $80 = $640 for the small paintings.
  Therefore, he earned a total of $500 + $640 = $1140 in all.