Cars A and B respectively start from A and B at the same time and drive towards each other. Under normal circumstances, they meet at point O after 6 hours. If B maintains normal speed and A travels 5 kilometers less per hour, the meeting point is 20 kilometers away from point O. If B travels 5 kilometers less per hour, the meeting place is 20 kilometers away from point O. How many kilometers?
甲、乙两车分别从A、B两地同时出发相向而行，正常情况下6小时后相遇O点．如果乙保持正常速度，甲每小时少行5千米，则相遇地点距离O点20千米，如果乙每小时少行5千米，则相遇地点距离O点20千米，那么A、B相距多少千米？
<gadget id="calculator">20 + 20</gadget>
<output>40</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 + 10</gadget>
<output>20</output>

<gadget id="calculator">20 * 6</gadget>
<output>120</output>

<result>120</result>