The workers repaired a section of road, and it was repaired on the first day (9/20), and the rest was 250m shorter than the repaired one. How long is this section of road in meters?
工人修一段公路，第一天修了(9/20)，剩下的比修了的少250m，这段路长多少米？
<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 - (9/20) - (9/20)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">250 / (1/10)</gadget>
<output>2_500</output>

<result>2_500</result>