The longest distance between north and south of my country's border is 5,500 kilometers, and the longest distance between east and west is 300 kilometers shorter than the distance between north and south. How many kilometers is the distance between east and west?
我国边界南北最长距离是5500千米，东西最长距离比南北距离短300千米，东西距离长多少千米？
<gadget id="calculator">5_500 - 300</gadget>
<output>5_200</output>

<result>5_200</result>