There were originally 25 passengers on a bus. After arriving at the People’s Park, 9 people went down and 17 people got on. How many passengers are there on the bus now?
一辆公共汽车上原来有25位乘客，到人民公园后，下去9人，又上了17人，现在公共汽车上有多少位乘客？
<gadget id="calculator">25 - 9</gadget>
<output>16</output>

<gadget id="calculator">16 + 17</gadget>
<output>33</output>

<result>33</result>