Two cars, A and B, drive from A and B oppositely at the same time. A travels 75 kilometers per hour, and B travels 65 kilometers per hour. Cars A and B continue to move forward after meeting for the first time. After arriving at places B and A respectively, they immediately return on the same road. The two cars traveled for a total of 6 hours from the departure to the second meeting. What is the distance between A and B in miles?
甲乙两辆汽车同时从A，B两地相对开出，甲每小时行75千米，乙每小时行65千米．甲乙两车第一次相遇后继续前进，分别到达B，A两地后，立即按原路返回，两车从出发到第二次相遇共行了6小时．A，B两地相距多少千米．
<gadget id="calculator">75 + 65</gadget>
<output>140</output>

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

<gadget id="calculator">140 * 2</gadget>
<output>280</output>

<result>280</result>