A road has been repaired for the full length (3/4), and there is still 60 km to be repaired. How many kilometers is this road?
一条公路，已经修了全长的(3/4)，还有60km没修，这条公路有多少km？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">60 / (1/4)</gadget>
<output>240</output>

<result>240</result>