The Experimental Primary School held a broadcasting exercise competition. Class 4•1 scored as follows: 2 judges scored 8 points, 6 judges scored 9 points, and 2 judges scored 10 points. What is the average score of the four-class broadcasting exercise competition?
实验小学举行广播操比赛，四•一班得分情况是：有2个评委打出8分，6个评委打出9分，2个评委打出10分．四•一班广播操比赛的平均成绩是多少？
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">9 * 6</gadget>
<output>54</output>

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

<gadget id="calculator">16 + 54 + 20</gadget>
<output>90</output>

<gadget id="calculator">2 + 6 + 2</gadget>
<output>10</output>

<gadget id="calculator">90 / 10</gadget>
<output>9</output>

<result>9</result>