An engineering team repaired a road. A total of 8 kilometers were built in the first 6 days, and an average of 3 kilometers was repaired every day in the next 9 days. How long is this road?
一个工程队修一条路，前6天共修了8千米，后9天平均每天修3千米，这条路有多长？
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<gadget id="calculator">8 + 27</gadget>
<output>35</output>

<result>35</result>