On a map with a scale of 1:4,000,000, the distance between A and B is 4.5 cm. If a car travels 50 kilometers per hour, how long will it take to arrive?
在一幅比例尺是1：4000000的地图上，甲、乙两城相距4.5厘米，一辆汽车每小时行50千米，几小时到达？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">4.5 / (1/4_000_000) / 100_000 / 50</gadget>
<output>3.6</output>

<result>3.6</result>