On a map with a scale of 1:20000000, the distance from Beijing to Hangzhou is 6 centimeters. How long does it take for a train to travel from Hangzhou to Beijing at a speed of 120 kilometers per hour?
在比例尺是1：20000000的地图上，北京到杭州的距离是6厘米，一列火车以每小时120千米的速度从杭州开往北京，几小时才能到达？
<gadget id="calculator">1 / 20_000_000</gadget>
<output>1/20_000_000 = around 0</output>

<gadget id="calculator">6 / (1/20_000_000) / 100_000 / 120</gadget>
<output>10</output>

<result>10</result>