A town wants to build a canal. The original plan is to build 20m per day, and it will be completed in 18 days. In order to supply water as soon as possible, it will take 12 days to complete the repair. How many meters should be repaired each day?
一个乡要修一条水渠，原计划每天修20m，18天修完．为了尽早一些供水，要12天修完，实际每天应修多少米？
<gadget id="calculator">18 / 12</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">20 * (3/2)</gadget>
<output>30</output>

<result>30</result>