An engineering team planned to build a 15-kilometer canal, and 1.8 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15千米的水渠，开工3天修了1.8千米．照这样计算，修完这条水渠一共要用多少天？
<gadget id="calculator">1.8 / 3</gadget>
<output>0.6</output>

<gadget id="calculator">15 / 0.6</gadget>
<output>25</output>

<result>25</result>