The engineering team dug a canal, dug the full length (3/5) in the first week, and dug the remaining 2 kilometers in the second week to complete the task. How long is this canal in kilometers?
工程队挖一条水渠，第一周挖了全长的(3/5)，第二周挖了剩下的2千米就完成了任务．这条水渠全长多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / (2/5)</gadget>
<output>5</output>

<result>5</result>