conversations.from: human
conversations.value: I'm completely lost with this math problem: At a party, there are 50 people. 30% of them are boys. How many girls are at this party?
  Can you give me a hand?
conversations.from: assistant
conversations.value: There are 50 * 30/100 = 15 boys at that party.
  That means there are 50 - 15 = 35 girls.