The plateau railway with the highest altitude and the longest route in the world is China's Qinghai-Tibet Railway. The Qinghai-Tibet Railway is 375 kilometers shorter than the Beijing-Guangzhou Railway (the longest north-south railway line in China), and the total length of the Beijing-Guangzhou Railway is 2331 kilometers. How many kilometers is the total length of the Qinghai-Tibet Railway? (solution by equation)
世界上海拔最高、线路最长的高原铁路是中国的青藏铁路．青藏铁路比京广铁路(中国最长的南北铁路干线)短375千米，京广铁路全长2331千米，青藏铁路全长多少千米？(用方程解)
<gadget id="calculator">2_331 - 375</gadget>
<output>1_956</output>

<result>1_956</result>