A piece of work was originally planned to be completed in 10 days, but it was actually completed in 8 days, and the working time was shortened ((())/(())).
一件工作，原计划10天完成，实际8天完成，工作时间缩短了((())/(()))．
<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>