A train is going from Shanghai to Beijing. There are 852 people on board. 256 people get off at Jinan Station on the way, and 503 people get on the train. How many people are there in total?
一列火车从上海开往北京，车上有852人，途中经过济南站有256人下车，又有503人上车，这时车内一共有多少人？
<gadget id="calculator">852 - 256</gadget>
<output>596</output>

<gadget id="calculator">596 + 503</gadget>
<output>1_099</output>

<result>1_099</result>