On a scale (1/4000000) map, the distance between A and B is 6 cm. The train travels from A to B at a speed of 120 kilometers per hour. How long does it take to get there?
在比例尺(1/4000000)的地图上，量得甲乙两站距离是6厘米，火车以每小时120千米的速度从甲站开往乙站，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 / 120</gadget>
<output>2</output>

<result>2</result>