An airplane flies 2,800 kilometers in 4 hours, and a train travels 490 kilometers in 7 hours. How many times faster is the speed of the airplane than the speed of the train?
一架飞机4小时飞行2800千米，一列火车7小时行490千米，飞机的速度是火车速度的多少倍？
<gadget id="calculator">490 / 7</gadget>
<output>70</output>

<gadget id="calculator">2_800 / 4 / 70</gadget>
<output>10</output>

<result>10</result>