The length of the Yangtze River is 6300 kilometers, which is 470 kilometers less than twice the length of the Yellow River. How many kilometers is the length of the Yellow River?
长江的长度是6300千米，比黄河长度的2倍少470千米，黄河长多少千米？
<gadget id="calculator">470 + 6_300</gadget>
<output>6_770</output>

<gadget id="calculator">6_770 / 2</gadget>
<output>3_385</output>

<result>3_385</result>