train travels 120 kilometers per hour, and it takes 4.5 hours to travel from station A to station B. How many kilometers is the length of the railway between A and B?
一列火车每小时行120千米，从甲站到乙站行了4.5小时．甲乙两站的铁路长有多少千米？
<gadget id="calculator">120 * 4.5</gadget>
<output>540</output>

<result>540</result>