45% of the total length of a canal in a certain town was built in the first month, and 7/20 of the full length was repaired in the second month. There is still 600 meters left to be repaired. What is the total length of this canal in meters?
某乡修一条水渠，第一个月修了全长的45%，第二个月修了全长的(7/20)，还剩600米没有修，这条水渠全长是多少米？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (9/20) - (7/20)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">600 / (1/5)</gadget>
<output>3_000</output>

<result>3_000</result>