To build a road with a length of 18.4 kilometers, 3.9 kilometers have been repaired, and then 0.5 kilometers will be repaired every day. How many days will it take to complete the rest of the road?
修一条长18.4千米的路，已经修好了3.9千米，接下来每天修0.5千米，余下的路要几天修完？
<gadget id="calculator">18.4 - 3.9</gadget>
<output>14.5</output>

<gadget id="calculator">14.5 / 0.5</gadget>
<output>29</output>

<result>29</result>