There are 586 people in a train, 350 people get off the train, and 210 people get on the train, how many people are there in the train at this time?
一列火车里有586人，中途有350人下车，又有210人上车，这时火车里有多少人．
<gadget id="calculator">586 - 350</gadget>
<output>236</output>

<gadget id="calculator">236 + 210</gadget>
<output>446</output>

<result>446</result>