In a certain competition, there were originally 10 first prizes and 20 second prizes. Now the last four of the first prizes are transferred to the second prizes. In this way, the average score of the second prizes is increased by 1 point. The average score of the students who won the first prize increased by 4 points. Find out how much more the average score of the first prize is than that of the second prize?
某次比赛中，原定一等奖10人，二等奖20人，现将一等奖中最后的四人调入二等奖，这样二等奖的学生的平均分提高了1分，得一等奖的学生的平均分提高了4分．求原来一等奖比二等奖平均分多几分？
<gadget id="calculator">4 * 6</gadget>
<output>24</output>

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

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<gadget id="calculator">24 + 20 + 4</gadget>
<output>48</output>

<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<result>12</result>