An engineering team planned to build a 12-kilometer canal, and 1.5 kilometers were repaired in 3 days. According to this calculation, how many days will it take to complete the construction of this canal?
某工程队计划修一条12千米的水渠，开工3天修了1.5千米．照这样计算，修完这条水渠一共要用多少天？
<gadget id="calculator">1.5 / 3</gadget>
<output>0.5</output>

<gadget id="calculator">12 / 0.5</gadget>
<output>24</output>

<result>24</result>