On a map with a scale of 1:6,000,000, the distance from Beijing to Shanghai is 17.5 centimeters. How many hours does it take for a car to travel from Beijing to Shanghai at a speed of 84 kilometers per hour?
在比例尺是1：6000000的地图上，量得北京到上海的距离是17.5厘米．一辆汽车以每小时84千米的速度从北京开往上海，需要多少小时？
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">17.5 / (1/6_000_000) / 100_000 / 84</gadget>
<output>12.5</output>

<result>12.5</result>