A project is completed every day (1/5), how many days can it be completed?
一项工程，每天完成它的(1/5)，几天可以完成？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / (1/5)</gadget>
<output>5</output>

<result>5</result>