Cars A and B leave from places A and B at the same time. The speed of car A is 55 km/h, and the speed of car B is 45 km/h. Cars A and B are at a distance between A and B. meet at the midpoint of 15 km. What is the distance in miles between A and B?
甲、乙两车从A、B两地同时相对开出，甲车的速度是55千米/时，乙车的速度是45千米/时，甲、乙两车在距离A、B两地的中点15千米处相遇．A、B两地之间的距离是多少千米？
<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">55 - 45</gadget>
<output>10</output>

<gadget id="calculator">30 / 10</gadget>
<output>3</output>

<gadget id="calculator">55 + 45</gadget>
<output>100</output>

<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<result>300</result>