A road repair team repairs a road, which has been repaired (3/7), and there are still 484 meters to be repaired. How many kilometers is this road?
一个修路队修一条公路，已修了(3/7)，还有484米没有修，这条公路长多少千米？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">484 / (4/7) / 1_000</gadget>
<output>847/1_000 = around 0.847</output>

<result>847/1_000 = around 0.847</result>