A worker completes (1/8) of a project in one day, and ((())/(())) of the whole project remains after he works for 3 days.
一个工人一天完成一项工程的(1/8)，他工作3天后还剩全部工程的((())/(()))．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) * 3</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>