Two trains, A and B, depart from places A and B respectively and run towards each other. A travels 150 kilometers per hour, and B is 20% slower than A per hour. It is known that the length of the railway between the two places is 540 kilometers. Car meet?
甲乙两列火车分别从A、B两地出发，相向而行，甲每小时行150千米，乙每小时比甲慢20%，已知两地之间铁路长540千米，几小时后两车相遇？
<gadget id="calculator">150 + 120</gadget>
<output>270</output>

<gadget id="calculator">540 / 270</gadget>
<output>2</output>

<result>2</result>