The farm dug a canal and dug 180 meters in the first 5 days. At this speed, it took another 16 days to complete the canal. How long is this canal in meters?
农场挖一条水渠，头5天挖了180米，照这样速度，又用了16天挖完这条水渠．这条水渠全长多少米？
<gadget id="calculator">5 + 16</gadget>
<output>21</output>

<gadget id="calculator">180 * 21</gadget>
<output>3_780</output>

<gadget id="calculator">3_780 / 5</gadget>
<output>756</output>

<result>756</result>