Two cars, A and B, start from A and B successively and drive towards each other. Car A travels 45 kilometers per hour, and car B is 9 kilometers faster than car A per hour. A starts 2 hours earlier. When they meet, A travels longer than B. 63 kilometers, how many kilometers is the distance between A and B?
甲乙两辆汽车先后从A、B两地出发相向而行，甲车每小时行45千米，乙车每小时比甲车快9千米，甲先出发2小时，相遇时甲比乙多行63千米，A、B两地相距多少千米？
<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<gadget id="calculator">90 - 63</gadget>
<output>27</output>

<gadget id="calculator">9 - 45</gadget>
<output>-36</output>

<gadget id="calculator">45 + (-36)</gadget>
<output>9</output>

<gadget id="calculator">27 / 9</gadget>
<output>3</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<gadget id="calculator">45 + 9</gadget>
<output>54</output>

<gadget id="calculator">54 * 3</gadget>
<output>162</output>

<gadget id="calculator">225 + 162</gadget>
<output>387</output>

<result>387</result>