An engineering team plans to repair 180km of roads, which has been repaired (5/6), how many kilometers are left to be repaired?
一个工程队计划修公路180km，已经修了(5/6)，还剩多少km没有修？
<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">180 * (1/6)</gadget>
<output>30</output>

<result>30</result>