The air line between A and B is 25cm long on a 1:6,000,000 map. A plane flies from A to B at a speed of 1,000km per hour. How many hours does it take to complete the flight?
甲乙两城之间的航空线在1：6000000的地图上长25cm，一架飞机从甲城飞往乙城时速是1000km，要几小时才能飞完全程？
<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">25 / (1/6_000_000) / 100_000 / 1_000</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>