There were originally 309 people on board the passenger ship. After arriving at the port, 115 people disembarked and 238 people boarded again. How many people were on the passenger ship when the ship sailed again?
客轮上原有309人，到达港口后有115人下船，又有238人上船，再开船时客轮上有多少人？
<gadget id="calculator">309 - 115</gadget>
<output>194</output>

<gadget id="calculator">194 + 238</gadget>
<output>432</output>

<result>432</result>