An airplane flies 2,700 kilometers in 4 hours. According to this calculation, it takes 2.5 hours to fly from city A to city B. How many kilometers is the air route between cities A and B?
一架飞机4小时飞行2700千米，照这样计算，从甲城到乙城共飞行2.5小时，甲乙两城的航线长多少千米？
<gadget id="calculator">2_700 / 4</gadget>
<output>675</output>

<gadget id="calculator">675 * 2.5</gadget>
<output>1_687.5</output>

<result>1_687.5</result>