To build a 16-kilometer road, 1.5 kilometers were built in the first 3 days. According to this calculation, how many days will it take to complete the task?
修一条16千米的公路，前3天修了1.5千米，照这样计算，还要修几天就能完成任务？
<gadget id="calculator">1.5 / 3</gadget>
<output>0.5</output>

<gadget id="calculator">16 / 0.5</gadget>
<output>32</output>

<gadget id="calculator">32 - 3</gadget>
<output>29</output>

<result>29</result>