A batch of goods is shipped, and (1/6) is shipped every day, how many days can it be shipped.
运一批货物，每天运(1/6)，多少天能运完．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<result>6</result>