On a map with a scale of (1/1600000), the distance between A and B is 16 cm. A car starts from City A at a speed of 64 kilometers per hour. How many hours does it take to reach City B?
在一幅比例尺是(1/1600000)的地图上，量得甲乙两城的距离是16厘米．一辆汽车以每小时64千米的速度从甲城出发，经过多少小时才能到达乙城？
<gadget id="calculator">1 / 1_600_000</gadget>
<output>1/1_600_000 = around 0.000001</output>

<gadget id="calculator">16 / (1/1_600_000) / 100_000 / 64</gadget>
<output>4</output>

<result>4</result>