There were 305 people on the train, 89 people got off and 156 people got on the train after arriving at the station. How many people were on the train when it drove again?
火车上原有305人，到站后有89人下车，有156人上车．再开车时火车上有多少人？
<gadget id="calculator">305 - 89</gadget>
<output>216</output>

<gadget id="calculator">216 + 156</gadget>
<output>372</output>

<result>372</result>