A car 20 meters long travels at a speed of 16 meters per second. How long will it take to pass through the 316-meter tunnel?
一辆长20米的汽车，以每秒16米的速度行驶．要全部通过316米的隧道，用多长时间？
<gadget id="calculator">20 + 316</gadget>
<output>336</output>

<gadget id="calculator">336 / 16</gadget>
<output>21</output>

<result>21</result>