A project needs 12 days to complete, how many days can complete 25% of the project.
一项工程需12天完成，多少天可完成这项工程的25%．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/4) / (1/12)</gadget>
<output>3</output>

<result>3</result>