A train is 180 meters long and travels 25 meters per second. How long does it take for the whole car to pass through a 120-meter-long cave?
一列火车长180米，每秒行驶25米．全车通过一条120米长的山洞，需要多长时间？
<gadget id="calculator">180 + 120</gadget>
<output>300</output>

<gadget id="calculator">300 / 25</gadget>
<output>12</output>

<result>12</result>