The road repair team repaired a road. It was repaired (1/4) in the first week and (1/5) in the second week. The first week was 900 meters longer than the second week. How many meters is this road?
修路队修一条路，第一周修了(1/4)，第二周修了(1/5)，第一周比第二周多修了900米，这条路有多少米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">900 / (1/20)</gadget>
<output>18_000</output>

<result>18_000</result>