Dayu Village dug a canal, dug (1/12) every day, and dug a total of 42 meters in 7 days. How long is this canal in meters?
大峪村挖一条水渠，每天挖(1/12)，挖了7天共挖了42米．这条水渠全长多少米？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">42 / 7 / (1/12)</gadget>
<output>72</output>

<result>72</result>