The distance on the map between AB and AB is 5 centimeters. It is known that the scale of this map is 1:2000000. A car travels from point A to point B at a speed of 50 kilometers per hour. How long does it take for the car to reach point B?
AB两地的图上距离是5厘米，已知这幅图的比例尺是1：2000000．一辆汽车以每小时50千米的速度从A地到B地，这辆车多少小时才能到达B地？
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">5 / (1/2_000_000) / 100_000 / 50</gadget>
<output>2</output>

<result>2</result>