An engineering team built a canal. On the first day, 25% of the total length was repaired, and there was still 900m left to be repaired. How long is this canal in meters?
某工程队修一条水渠，第一天修了全长的25%，还剩下900m没修，这条水渠全长多少米？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">900 / (3/4)</gadget>
<output>1_200</output>

<result>1_200</result>