Two cars, A and B, drive from A and B at the same time. The speed ratio of A and B is 3:5. After 3 hours, the two cars meet. When they meet, B travels 120 kilometers longer than A. How many miles is the distance between B and B?
甲乙两辆汽车从A、B两地同时相对开出，甲、乙两车速度的比是3：5，经过3小时两车相遇，相遇时乙车比甲车多行120千米，A、B两地相距多少千米？
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">60 * 8</gadget>
<output>480</output>

<result>480</result>