Two cars, A and B, start from A and B respectively and drive towards each other. Car A travels first for 3 hours and then B starts from B. After 5 hours after B starts, the distance between the two cars is still 15 kilometers. Car A travels 48 kilometers per hour, and car B travels 50 kilometers per hour. What is the distance in kilometers between A and B?
甲、乙两辆汽车分别从A、B两地出发相向而行，甲车先行3小时后乙车从B地出发，乙车出发5小时后两车还相距15千米．甲车每小时行48千米，乙车每小时行50千米．求A、B两地间相距多少千米？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">8 * 48</gadget>
<output>384</output>

<gadget id="calculator">5 * 50</gadget>
<output>250</output>

<gadget id="calculator">384 + 250 + 15</gadget>
<output>649</output>

<result>649</result>