On a map with a scale of 1:60000000, the distance between A and B is 4.5 cm. At 8:30 am, a plane flies from A to B and arrives at 10:30 am. The plane travels every hour. How many kilometers.
在比例尺是1：60000000的地图上，量得甲乙两地的距离是4.5厘米，上午8点30分有一架飞机从甲地飞往乙地，上午10点30分到达，这架飞机每小时行多少千米．
<gadget id="calculator">270_000_000 / 100_000 / 2</gadget>
<output>1_350</output>

<result>1_350</result>