A and B train stations are 486 kilometers apart. Trains A and B depart from the two places at the same time and travel towards each other. After 4.5 hours, the two trains meet on the way. Train A travels 6 kilometers per hour on average faster than train B, how many kilometers per hour does train A travel on average?
AB两火车站相距486千米，甲乙两火车分别从两地同时出发，相向而行，4.5小时后两火车途中相遇．甲火车比乙火车平均每小时快6千米，甲火车平均每小时行多少千米？
<gadget id="calculator">486 / 4.5</gadget>
<output>108</output>

<gadget id="calculator">108 + 6</gadget>
<output>114</output>

<gadget id="calculator">114 / 2</gadget>
<output>57</output>

<result>57</result>