There were 485 people on a ship when it set off from the port. After arriving at the first stop, 217 people got off and 173 people got on. How many people are there now?
一艘船从港口出发时有485人，到了第一站后下了217人，又上了173人，现在有多少人？
<gadget id="calculator">485 - 217</gadget>
<output>268</output>

<gadget id="calculator">268 + 173</gadget>
<output>441</output>

<result>441</result>