The engineering team laid a section of railway track, and laid 1,800 meters in the first 5 days. At this speed, it took another 20 days to finish laying this section of railway track. How many meters is the total length of this section of railway track? (Answer with proportional knowledge)
工程队铺设一段铁轨，前5天铺设了1800米，照这样的速度，又铺设了20天才把这段铁轨铺完，这段铁轨全长多少米？(用比例知识解答)
<gadget id="calculator">1_800 / 5</gadget>
<output>360</output>

<gadget id="calculator">360 * 5</gadget>
<output>1_800</output>

<gadget id="calculator">360 * 20</gadget>
<output>7_200</output>

<gadget id="calculator">1_800 + 7_200</gadget>
<output>9_000</output>

<result>9_000</result>