The road workers repaired a road, and on the first day they repaired half of the total length. The one repaired the next day was 0.95 kilometers less than the remaining half, and 6.23 kilometers remained unrepaired. How long is this road in kilometers?
修路工人修一条公路，第一天修了全长的一半．第二天修了的比余下的一半少0.95千米，还有6.23千米没有修．这条公路全长多少千米？
<gadget id="calculator">6.23 - 0.95</gadget>
<output>5.28</output>

<gadget id="calculator">5.28 * 2 * 2</gadget>
<output>21.12</output>

<result>21.12</result>