The "Haixi" train carried 813 passengers when it departed from Longyan Station, 89 passengers got off at Changting Station, and 237 passengers boarded again. How many passengers are on the train at this time?
"海西号"列车从龙岩站出发时载有乘客813人，到长汀站下车了89人，又上车237人．这时火车上有乘客多少人？
<gadget id="calculator">813 - 89</gadget>
<output>724</output>

<gadget id="calculator">724 + 237</gadget>
<output>961</output>

<result>961</result>