On a map with a scale of 1:7500000, the measured distance from point A to point B on the map is 12cm. A freight train departs from point A to point B at a speed of 90km per hour. How many hours will it arrive?
在比例尺是1：7500000的地图上，量的甲地到乙地的图上距离是12cm，一列货车以每小时90km的速度从甲地出发开往乙地，几小时后可以到达？
<gadget id="calculator">1 / 7_500_000</gadget>
<output>1/7_500_000 = around 0</output>

<gadget id="calculator">12 / (1/7_500_000) / 100_000 / 90</gadget>
<output>10</output>

<result>10</result>