Two cars of A have set off from two places 324 kilometers apart at the same time, and meet each other after 6 hours. The speed ratio of car A and the other car is 4:5. How many kilometers does car A travel per hour?
甲已两辆汽车从相距324千米的两地同时相对开出，经过6小时后相遇，甲车与已车的速度比是4：5，甲车每小时行多少千米？
<gadget id="calculator">324 / 6</gadget>
<output>54</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">54 * (4/9)</gadget>
<output>24</output>

<result>24</result>