Two trains, A and B, depart from A and B at the same time, and meet each other after 6 hours. After the meeting, the two trains continue to run at the original speed, and after another 4 hours, A arrives at B. It is known that car A travels 12 kilometers more per hour than car B, how many kilometers does car A travel per hour?
甲、乙两列火车分别从A、B两地同时相对开出，经过6小时相遇，相遇后两车按原来的速度继续行驶，又经过4小时，甲车到达B地．已知甲车每小时比乙车多行12千米，求甲车每小时行多少千米．
<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<gadget id="calculator">6 - 6 - 4</gadget>
<output>-4</output>

<gadget id="calculator">6 + (-4)</gadget>
<output>2</output>

<gadget id="calculator">72 / 2</gadget>
<output>36</output>

<result>36</result>