One piece of work was originally planned to be completed in 8 days, but actually completed in 5 days. Working hours are shortened ((())/(())).
一件工作，原计划8天完成，实际5天完成．工作时间缩短了((())/(()))．
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>