Two cars, A and B, leave from places A and B at the same time. When car A completes the journey (4/9), it meets car B. After the meeting, car B continues to move forward at a speed of 80 km per hour and takes 2.5 hours to travel. Finish the rest of the journey. How many kilometers are there between A and B?
甲乙两汽车分别从A、B两地同时相对开出，甲车行完全程的(4/9)时，与乙车相遇，相遇后乙车继续以每小时80km的速度前进，用2.5小时行完余下路程．A、B两地相距多少km？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">2.5 / (4/9)</gadget>
<output>5.625</output>

<gadget id="calculator">80 * 5.625</gadget>
<output>450</output>

<result>450</result>