The distance between A and B is 2590 km. Two planes fly opposite each other from two cities at the same time. After 2 hours of meeting, one plane flies 650 kilometers per hour, how many kilometers per hour does the other fly?
甲乙两城相距2590千米．两架飞机同时从两城相对飞出，经过2小时相遇，一架飞机每小时飞行650千米，另一架每小时飞行多少千米？
<gadget id="calculator">2_590 / 2</gadget>
<output>1_295</output>

<gadget id="calculator">1_295 - 650</gadget>
<output>645</output>

<result>645</result>