For a canal, the full length (3/10) of the canal was built on the first day. The length of the canal was 20% longer than that of the second day, and the remaining length was exactly 108 meters longer than the length of the second day. What is the length of the canal? rice.
一条水渠，第一天修了全长的(3/10)，第一天比第二天多修了20%，余下的长恰好比第二天修的长度多了108米，则这条渠长多少米．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(3/10) / (6/5)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/10) + (1/4)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">1 - (11/20) - (1/4)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">108 / (1/5)</gadget>
<output>540</output>

<result>540</result>