A road was built with a total length of 27 kilometers, and 1.5 kilometers were repaired in 15 days. According to this calculation, how many days will it take to complete the road? (Solve with ratio)
修一条公路，总长27千米，15天修了1.5千米．照这样计算，修完这条公路一共要用多少天？(用比例解)
<gadget id="calculator">15 * 27</gadget>
<output>405</output>

<gadget id="calculator">405 / 1.5</gadget>
<output>270</output>

<result>270</result>