The car travels 18 meters per second, the length of the car is 18 meters, and the length of the tunnel is 324 meters. How long will it take for the car to pass through the tunnel?
这辆汽车每秒行18米，车的长度是18米，隧道长324米，这辆汽车全部通过隧道要用多长时间．
<gadget id="calculator">18 + 324</gadget>
<output>342</output>

<gadget id="calculator">342 / 18</gadget>
<output>19</output>

<result>19</result>