To dig a canal, the original plan was to dig 135 meters per day and complete it in 20 days. If you dig more (1/3) every day, how many days can it be completed?
挖一条水渠，原计划每天挖135米，20天完成．如果每天多挖(1/3)，多少天可以完成？
<gadget id="calculator">135 * 20</gadget>
<output>2_700</output>

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

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">135 * (4/3)</gadget>
<output>180</output>

<gadget id="calculator">2_700 / 180</gadget>
<output>15</output>

<result>15</result>