Wang Jun participated in the singing competition, and the scores of the seven judges were 89 points, 91 points, 81 points, 90 points, 92 points, 88 points, and 97 points. After removing the highest score and the lowest score, what is Wang Jun's final average score?
王军参加歌唱比赛，7个评委的打分分别是89分、91分、81分、90分、92分、88分、97分．去掉一个最高分和一个最低分，王军的最后平均分是多少？
<gadget id="calculator">89 + 91 + 90 + 92 + 88</gadget>
<output>450</output>

<gadget id="calculator">450 / 5</gadget>
<output>90</output>

<result>90</result>