There are 863 passengers on the train from Beijing to Shanghai, 259 people get off at Jinan Station, and 284 people get on the train. How many people are on the train at this time?
从北京到上海的列车上有乘客863人，到济南站下车259人，上车284人，这时车上有多少人？
<gadget id="calculator">863 - 259</gadget>
<output>604</output>

<gadget id="calculator">604 + 284</gadget>
<output>888</output>

<result>888</result>