There were 305 passengers on the lucky passenger ship when it departed from the starting port, 89 people disembarked and 108 boarded at the midway port. How many people are on board at this time?
幸运号客轮从起始港口出发时有游客305人，到中途一港口有89人下船，108人上船．此时客轮上有多少人？
<gadget id="calculator">305 - 89</gadget>
<output>216</output>

<gadget id="calculator">216 + 108</gadget>
<output>324</output>

<result>324</result>