In an English competition, there are 12 people who scored 90 points, accounting for (1/5) of the total number of entries. If the sum of the scores of these 12 people is 22.5% of the sum of the scores of all the people, then the average score of this English competition is How much is the score.
在一次英语比赛中，得90分的有12人，占参赛总数的(1/5)，如果这12人的得分之和是所有人的得分之和的22.5%，那么这次英语比赛的平均分是多少．
<gadget id="calculator">22.5 / 100</gadget>
<output>0.225</output>

<gadget id="calculator">12 / 0.225</gadget>
<output>53.333333</output>

<gadget id="calculator">90 * 53.333333</gadget>
<output>4_799.99997</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">12 / (1/5)</gadget>
<output>60</output>

<gadget id="calculator">4_799.99997 / 60</gadget>
<output>80</output>

<result>80</result>