Xinzhuang dug a canal and dug 240 meters in 3 days. According to this calculation, it can be dug in 12 days. How long is this canal in meters? (Solve with ratio)
辛庄挖一条水渠，3天挖了240米，照这样计算，挖12天就能够挖完，这条水渠全长多少米？(用比例解)
<gadget id="calculator">240 * 12</gadget>
<output>2_880</output>

<gadget id="calculator">2_880 / 3</gadget>
<output>960</output>

<result>960</result>