The average speed of the train is 70.5 km/h, how many kilometers does it take to travel in 6.4 hours?
火车平均速度是70.5千米/小时，坐6.4小时走多少千米路程．
<gadget id="calculator">70.5 * 6.4</gadget>
<output>451.2</output>

<result>451.2</result>