project has been completed (7/10), and there is still ((())/(())) to be completed.
一项工程，已经完成了(7/10)，还剩下((())/(()))没有完成．
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>