A car is 0.5 hours and 45.2km, and the speed of a train is about twice that of the car. How many kilometers does the train travel per hour?
一辆小汽车0.5时45.2km，一列火车的行驶速度约是这辆小汽车的2倍，这列火车每小时行驶多少千米？
<gadget id="calculator">90.5 * 2</gadget>
<output>181</output>

<result>181</result>