Li Zhuang wants to build a 1,200-kilometer canal, and 60% of the total length was built in the first 3 days. Based on this calculation, how many days will it take to complete the canal?
李庄要修一条长1200千米长的水渠，前3天修了全长的60%．照这样计算，修完这条水渠还需要多少天？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 3</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1_200 * (1/5)</gadget>
<output>240</output>

<gadget id="calculator">1_200 / 240</gadget>
<output>5</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<result>2</result>