On two parallel roads, two cars drive oppositely from A and B, and drive back and forth between A and B. The passenger car is 150Km/h, and the truck is 120Km/h. It is known that the two cars meet from the first time to the second. The second encounter is 6 hours apart, what is the distance between A and B?
在并列两条公路上，两辆车从甲乙两地相对开出，且在甲乙两地之间往返行驶，客车150Km/h，货车120Km/h，现知两辆车从第一次相遇到第二次相遇相隔6小时，求甲乙两地距离？
<gadget id="calculator">150 + 120</gadget>
<output>270</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">270 * 3</gadget>
<output>810</output>

<result>810</result>