To repair a 200-meter road, the entire length (3/10) has been repaired, and what fraction of the entire length is left to be repaired?
要修200米的路，已经修了全程的(3/10)，还剩下全程的几分之几没修？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<result>7/10 = around 0.7</result>