Dongying Village dug a drainage canal. The original plan was to dig 270m per day, and the task could be completed in 20 days. The actual digging was 1/3 more than planned every day, and how many days could it actually be completed. (Answer with proportional knowledge)
东营村挖一条排水渠，原计划每天挖270m，20天能完成任务，实际每天比计划多挖(1/3)，实际多少天能挖完．(用比例知识解答)
<gadget id="calculator">270 * 20</gadget>
<output>5_400</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">270 * (1/3)</gadget>
<output>90</output>

<gadget id="calculator">270 + 90</gadget>
<output>360</output>

<gadget id="calculator">5_400 / 360</gadget>
<output>15</output>

<result>15</result>