One road has been repaired (7/10), and how many roads have not been repaired.
有一条道路修好了(7/10)，还有多少没有修好．
<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>