Before arriving at Beijing Station, there were 915 passengers on the train, and 307 passengers got off at Beijing Station. There are 289 passengers on the upper deck. After the train departs from Beijing Railway Station, how many passengers are there on the train?
到北京站之前，火车上有乘客915人，在北京站下车的乘客有307人．上层的乘客有289人．火车从北京站开出后，车上有乘客多少人？
<gadget id="calculator">915 - 307</gadget>
<output>608</output>

<gadget id="calculator">608 + 289</gadget>
<output>897</output>

<result>897</result>