A water canal in Xinzhuang has been built for 220 meters, which is 20 meters longer than the total length (4/5). How many meters is the total length of this canal? (solution by equation)
新庄修一条水渠，现在已经修完220米，比全长的(4/5)还多20米，这条水渠全长有多少米？(用方程解)
<gadget id="calculator">220 - 20</gadget>
<output>200</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">200 / (4/5)</gadget>
<output>250</output>

<result>250</result>