To build a canal, it is planned to build 60 meters per day, and it can be completed in 12 days. In fact, it is 20 meters more than the original plan per day, and it only takes a few days to complete it?
修一条水渠，计划每天修60米，12天可以修完，实际每天比原计划多修20米，只需要几天修完？
<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<gadget id="calculator">12 / 80</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">60 * (3/20)</gadget>
<output>9</output>

<result>9</result>