conversations.from: human
conversations.value: I need a clearer understanding of how to solve: The seats of a bus are arranged in 23 rows of 4 seats. At the start, 16 people climb. At the first stop, 15 people board the bus and 3 get off. At the second stop, 17 people get on the bus and 10 get off. How many empty seats are there after the second stop?
conversations.from: assistant
conversations.value: There are 23 * 4 = 92 seats on this bus.
  After the first stop, there are 16+15 - 3 = 28 people on the bus.
  After the 2nd stop, there are 28+17 - 10 = 35 people on the bus.
  So there are 92 - 35 = 57 empty seats on the bus after the 2nd stop.