A village needs to dig a canal to irrigate the fields. The first time it dug 180 meters, and the second time it dug the rest (2/7). At this time, the dug and undug lengths are just equal. Question: How long is this canal in meters?
某村为了灌溉田地，要挖一条水渠，第一次挖了180米，第二次挖了余下的(2/7)，这时挖好的和没挖好的长度恰好相等．问：这条水渠全长多少米？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">180 * (2/7)</gadget>
<output>360/7 = around 51.428571</output>

<gadget id="calculator">180 - (360/7)</gadget>
<output>900/7 = around 128.571429</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) - (2/7)</gadget>
<output>3/14 = around 0.214286</output>

<gadget id="calculator">(900/7) / (3/14)</gadget>
<output>600</output>

<result>600</result>