On a map with a scale of 1:2000000, the measured distance between A and B is 3.6 cm. How many kilometers is the actual distance between A and B? A car drives from city A at a speed of 90 kilometers per hour, how many hours can it reach city B?
在比例尺是1：2000000的地图上，量得甲乙两地的距离是3.6厘米，甲乙两地的实际距离是多少千米？一辆汽车以每小时90千米的速度从甲地开出，几小时可以到达乙城？
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">3.6 / (1/2_000_000) / 100_000 / 90</gadget>
<output>0.8</output>

<result>0.8</result>