Two cars, A and B, drive from two places at the same time. Car A travels 48 kilometers per hour, and car B travels 52 kilometers per hour. After 4.5 hours, the distance between the two cars is 50 kilometers. How many kilometers are the distance between A and B?
甲、乙两辆汽车同时从两地相对开出，甲车每小时行48千米，乙车每小时行52千米，4.5小时后两车相距50千米，甲乙两地相距多少千米？
<gadget id="calculator">100 * 4.5</gadget>
<output>450</output>

<gadget id="calculator">450 - 50</gadget>
<output>400</output>

<result>400</result>