It takes 4.6 hours for my brother to go to college by train, and the average speed of the train is 70.5 km/h. How many kilometers has my brother traveled by train?
哥哥上大学要坐4.6小时的火车，火车的平均速度是70.5千米/时．哥哥坐火车走了多少千米？
<gadget id="calculator">4.6 * 70.5</gadget>
<output>324.3</output>

<result>324.3</result>