To build a road, the full length (4/5) was built in the first two weeks, what percentage of the total length was not repaired?
修一条公路，前两周修了全长的(4/5)，没修的占全长的几分之几？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

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