Cars A and B set off from A and B respectively at the same time, travel towards each other, and meet at point C after 8 hours. If the speed of car A remains the same, car B will travel 5 kilometers per hour. And the two cars also start from A and B at the same time and go towards each other, then the meeting point is 15 kilometers away from point C. If the speed of car B remains the same, and car A travels 5 kilometers more per hour, and the two cars start from A and B at the same time and go towards each other, then the meeting point is 20 kilometers away from point C, and the distance between A and B is How many kilometers is the distance.
甲、乙两车分别从A、B两地同时出发，相向而行，8小时后相遇于C点．如果甲车速度不变，乙车每小时多行5千米．且两车还从A、B两地同时出发相向而行，则相遇地点距C点15千米．如果乙车速度不变，甲车每小时多行5千米，且两车还从A、B两地同时出发相向而行，则相遇地点距C点20千米，A、B两地之间的距离为多少千米．
<gadget id="calculator">15 / 1</gadget>
<output>15</output>

<gadget id="calculator">15 + 20</gadget>
<output>35</output>

<gadget id="calculator">35 / 5</gadget>
<output>7</output>

<gadget id="calculator">8 - 7</gadget>
<output>1</output>

<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">35 * 8</gadget>
<output>280</output>

<result>280</result>