Car A and Car B are traveling towards each other from places A and B at the same time. Car A travels 48 kilometers per hour, and car B travels 42 kilometers per hour. The two cars meet at the midpoint of 9 kilometers. Find the distance between A and B in kilometers?
甲车和乙车同时从A，B两地相向而行．甲车每小时行48千米，乙车每小时行42千米，两车在里中点9千米处相遇，求A，B两地相距多少千米？
<gadget id="calculator">48 + 42</gadget>
<output>90</output>

<gadget id="calculator">48 - 42</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</gadget>
<output>3</output>

<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<result>270</result>