There were 42 people on an air-conditioned car, 8 people got off the car halfway, and 16 people got on, how many people are on the car now?
一辆空调车上有42人，中途下车8人，又上来16人，现在车上有多少人？
<gadget id="calculator">42 - 8</gadget>
<output>34</output>

<gadget id="calculator">34 + 16</gadget>
<output>50</output>

<result>50</result>