A supersonic plane flies 0.5km per second, and a train travels 0.025km per second. How many times is the speed of a supersonic plane faster than that of a train?
超音速飞机每秒飞行0.5km，火车每秒行驶0.025km，超音速飞机的速度是火车的多少倍．
<gadget id="calculator">0.5 / 0.025</gadget>
<output>20</output>

<result>20</result>