An average of 18.5 kilometers is repaired every day to build a section of road. After 15 days of repair, there is still 9.5 kilometers left. How long is this section of road in kilometers?
修一段公路，平均每天修18.5千米，修15天后还剩9.5千米，这段公路长多少千米？
<gadget id="calculator">18.5 * 15</gadget>
<output>277.5</output>

<gadget id="calculator">277.5 + 9.5</gadget>
<output>287</output>

<result>287</result>