There were originally 45 passengers in the car. After arriving at the station, 10 people went down and 12 people came up. How many passengers are there in the car now?
车上原有45位乘客，到站后下去10位，上来12位，现在车上有多少位乘客？
<gadget id="calculator">45 - 10</gadget>
<output>35</output>

<gadget id="calculator">35 + 12</gadget>
<output>47</output>

<result>47</result>