On a map with a scale of 1:4,000,000, the distance from city A to city B is 6 centimeters. At 8:00 a.m., a car departs from city A to city B at a speed of 60 kilometers per hour. How long does it take to get there?
在比例尺为1：4000000的地图上A城到B城的距离有6厘米，上午8时一辆汽车以每小时60千米的速度从A城出发开往B城，几小时可以到达？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">6 / (1/4_000_000) / 100_000 / 60</gadget>
<output>4</output>

<result>4</result>