In a certain mathematics competition, there were originally 5 first prizes and 10 second prizes. Now the last 2 first prizes are adjusted to second prizes. In this way, the average score of the second prize students increased by 1 point, and the first prize students The average score of the first prize has increased by 2 points, so how much more is the average score of the first prize than the average score of the second prize?
某次数学竞赛，原定一等奖5人，二等奖10人，现将一等奖最后2人调整为二等奖，这样二等奖学生的平均分提高了1分，一等奖学生的平均分提高了2分，那么原来一等奖平均分比二等奖平均分多多少分？
<gadget id="calculator">6 + 6</gadget>
<output>12</output>

<gadget id="calculator">12 + 6</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<result>9</result>