conversations.from: human
conversations.value: Archie is playing with his marbles outside. He loses 60% of them into the street. Of the remaining ones, he loses half down a sewer. If he has 20 left, how many did he start with?
  Can you solve this problem?
conversations.from: assistant
conversations.value: He had 40 before losing them into the sewer because 20 x 2 =40
  He started with 100 because 40/.4=100