On the railway diagram with a scale of 1:6000000, the length of the railway between A and B is 7.2 cm. If it takes 4.5 hours for a passenger train to travel from city A to city B, what is the average speed of this passenger train in kilometers per hour?
在比例尺为1：6000000的铁路运行图上，量得甲、乙两城的铁路长7.2厘米．如果一列客车从甲城开往乙城要用4.5小时，这列客车平均每小时的速度是多少千米？
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">7.2 / (1/6_000_000) / 100_000 / 4.5</gadget>
<output>96</output>

<result>96</result>