conversations.from: human
conversations.value: Michael was watching a TV show, which was aired for 1.5 hours. During this time, there were 3 commercials, which lasted 10 minutes each. How long (in hours) was the TV show itself, not counting commercials?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: Each commercial lasted 10 minutes, so three commercials lasted 3 * 10 = 30 minutes.
  The show was aired for 1.5 hours, and 30 minutes is 0.5 of an hour, so without the commercials, the show was 1.5 - 0.5 = 1 hour long.