In the 2009 Tour of Chongming Island International Road Cycling Competition, the Chongbei line had a distance of about 204 kilometers, which was 48 kilometers less than twice that of the Chongdong line. How many kilometers was the Chongdong line?
在2009年环崇明岛国际公路自行车比赛中，崇北线的赛程大约是204千米，比崇东线赛程的2倍少48千米，崇东线的赛程是多少千米？
<gadget id="calculator">48 + 204</gadget>
<output>252</output>

<gadget id="calculator">252 / 2</gadget>
<output>126</output>

<result>126</result>