Two cars, A and B, drive from A and B respectively, and meet after 2.5 o'clock. When they meet, car B travels 105 kilometers, and continues driving after meeting. Cars A and B arrive at places B and A respectively, and immediately drive back. When they meet for the second time, car B is 90 kilometers away from place A. Find the distance between places A and B.
甲、乙两辆汽车分别从A、B两地相对开出，2.5时后相遇，相遇时，乙车行了105千米，相遇后继续行驶．甲、乙两车分别到达B、A两地后，马上往回开，第二次相遇时，乙车离A地90千米，求A、B两地的路程．
<gadget id="calculator">3 * 105</gadget>
<output>315</output>

<gadget id="calculator">315 - 90</gadget>
<output>225</output>

<result>225</result>