A road has been repaired for 304.6 kilometers, which is 123.65 kilometers longer than the one that has not been repaired. How long is this road?
一条公路，已经修好了304.6千米，比没修好的多123.65千米，这条公路有多长？
<gadget id="calculator">304.6 - 123.65</gadget>
<output>180.95</output>

<gadget id="calculator">304.6 + 180.95</gadget>
<output>485.55</output>

<result>485.55</result>