Cars A and B drive towards each other from places A and B at the same time. The speed ratio of cars A and B is 5:4. After the two cars meet, the speed of car A remains the same, and car B travels 18,000 more per hour than before. m, the result is that the two cars arrive at the starting point of each other at the same time. How many kilometers per hour does the car travel?
甲、乙两车同时从A、B两地相向开出，甲、乙两车的速度比是5：4，两车相遇后，甲车速度不变，乙车每小时比原来多行18千米，结果两车恰好同时到达对方出发地．甲车每小时行多少千米？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) * (5/4)</gadget>
<output>25/16 = around 1.5625</output>

<gadget id="calculator">(25/16) - 1</gadget>
<output>9/16 = around 0.5625</output>

<gadget id="calculator">18 / (9/16)</gadget>
<output>32</output>

<gadget id="calculator">32 * (5/4)</gadget>
<output>40</output>

<result>40</result>