Two cars, A and B, depart from A to B at the same time. Car A travels 50 kilometers per hour, and Car B travels 45 kilometers per hour. On the way, A stops for 3 hours. As a result, A arrives at B one hour later than B. How many miles is the distance between A and B?
甲乙两车同时从A地出发去B地，甲车每小时行50千米，乙车每小时行45千米，途中甲车停车3小时，结果甲车比乙车晚一小时到达B地．AB两地之间的距离几千米？
<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<gadget id="calculator">150 - 50</gadget>
<output>100</output>

<gadget id="calculator">50 - 45</gadget>
<output>5</output>

<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<gadget id="calculator">20 * 45</gadget>
<output>900</output>

<result>900</result>