The road crew builds a road. 4.5 kilometers have been repaired, and the rest is 5 kilometers more than 2.5 times the repaired distance. How many kilometers are left to be repaired?
筑路队修筑一条公路．已经修了4.5千米，剩下的比修了的2.5倍多5千米，还剩多少千米没修？
<gadget id="calculator">4.5 * 2.5</gadget>
<output>11.25</output>

<gadget id="calculator">11.25 + 5</gadget>
<output>16.25</output>

<result>16.25</result>