The car travels 45 kilometers per hour, and the train travels 25 kilometers more than the car per hour. The flight distance of an airplane per hour is 9 times that of a train. How many kilometers does an airplane fly per hour?
小汽车每时行45千米，火车每时比小汽车多行25千米．飞机每时飞行的航程是火车的9倍，飞机每时飞行多少千米？
<gadget id="calculator">45 + 25</gadget>
<output>70</output>

<gadget id="calculator">70 * 9</gadget>
<output>630</output>

<result>630</result>