There is a canal that was repaired in two weeks. In the first week, 55% of its total length was repaired, which is 480 meters longer than in the second week. How long is this canal in meters?
有一条水渠，两星期修好，第一星期修了全长的55%，比第二星期多修480米，这条水渠全长多少米？
<gadget id="calculator">55 / 100</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">1 - (11/20)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(11/20) - (9/20)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">480 / (1/10)</gadget>
<output>4_800</output>

<result>4_800</result>