Two cars, A and B, leave opposite places A and B at the same time, and the two cars meet after 7 hours. It is known that car A travels 48 kilometers per hour, and car B travels 57 kilometers per hour. How many kilometers are there between A and B?
甲乙两两汽车同时从A、B两地相对开出，7小时后两车相遇．已知甲车每小时行48千米，乙车每小时行57千米．A、B两地相距多少千米？
<gadget id="calculator">48 + 57</gadget>
<output>105</output>

<gadget id="calculator">105 * 7</gadget>
<output>735</output>

<result>735</result>