conversations.from: human
conversations.value: I need a clearer understanding of how to solve: The number of songs in a playlist is 300. If John has 20 such playlists, and each song is 10 hours long, how many hours will the 20 playlists last in total?
conversations.from: assistant
conversations.value: Since each playlist has 300 songs, the total number of songs in the 20 playlists is 20*300= 6000.
  If each song is 10 hours long, the 6000 songs in the 20 playlists last a total of 6000*10 = 60000 hours