The car travels 18 meters per second, the length of the car is 18 meters, and the bridge is 360 meters long. How long will it take for all the cars to pass the bridge?
这辆汽车每秒行18米，车的长度是18米，桥长360米，这辆汽车全部通过桥要用多长时间？
<gadget id="calculator">18 + 360</gadget>
<output>378</output>

<gadget id="calculator">378 / 18</gadget>
<output>21</output>

<result>21</result>