To welcome the World Expo, improve the road, a road with a length of 120 meters has been repaired (5/6), how many meters are left to be repaired.
迎世博，整治公路，一条长120米的公路，已经修了(5/6)，还有多少米没修．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">120 * (1/6)</gadget>
<output>20</output>

<result>20</result>