Cars A and B drive opposite each other from places A and B at the same time. When they meet each other, the distance traveled by cars A and B is 5:4. After the encounter, car B is 9 kilometers faster than car A per hour, and car A is still at the original speed. Go forward, and the two cars arrive at the destination at the same time. It is known that the second car has traveled for 12 hours. Ask: How many kilometers are the distance between A and B?
甲、乙两车同时从A、B两地相对开出，相遇时甲、乙两车所行路程是5：4，相遇后，乙每小时比甲快9千米，甲车仍按原来速度前进，结果两车同时到达目的地，已知乙车一共行了12小时，问：A、B两地相距多少千米．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) - 1</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">9 / (1/4)</gadget>
<output>36</output>

<gadget id="calculator">36 * 12</gadget>
<output>432</output>

<result>432</result>