The Hope passenger ship originally had 600 passengers. After arriving at the port, 157 people disembarked and another 243 boarded. How many passengers are there on the passenger ship now?
希望号客轮原有乘客600人，到达港口后，有157人离船，另有243人上船，现在客轮上有多少乘客？
<gadget id="calculator">600 - 157</gadget>
<output>443</output>

<gadget id="calculator">443 + 243</gadget>
<output>686</output>

<result>686</result>