How many minutes does it take for a 300-meter-long train to pass through a 1700-meter tunnel at a speed of 20 kilometers per hour?
一列长300米的火车，它以每小时20千米的速度通过1700米的隧道需要多少分钟？
<gadget id="calculator">300 + 1_700</gadget>
<output>2_000</output>

<gadget id="calculator">1_000 / 3</gadget>
<output>1_000/3 = around 333.333333</output>

<gadget id="calculator">2_000 / (1_000/3)</gadget>
<output>6</output>

<result>6</result>