On a map with a scale of 1:800,000, the distance between A and B is 15 cm. If a car starts from A at a speed of 60 kilometers per hour, how many hours does it take to reach B?
在比例尺1：800000的地图上，量得A、B两地距离是15厘米，一辆汽车以每小时60千米的速度从A出发，经过多少小时才到B地？
<gadget id="calculator">1 / 800_000</gadget>
<output>1/800_000 = around 0.000001</output>

<gadget id="calculator">15 / (1/800_000) / 100_000 / 60</gadget>
<output>2</output>

<result>2</result>