On a map with a scale of 1:5,000,000, the distance between A and B is 4.5 cm. If a car drives from A to B at a speed of 50 kilometers per hour, how many hours will it take to get there?
在比例尺1：5000000的地图上，量得甲、乙两地距离是4.5厘米，一辆汽车以每小时50千米的速度从甲地开往乙地，几小时可以到达？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">4.5 / (1/5_000_000) / 100_000 / 50</gadget>
<output>4.5</output>

<result>4.5</result>