The school held a singing competition, and 6 judges gave grades to Class 5 and 8. If the highest score was removed, the average score would be 87 points. If the lowest score was removed, the average score would be 90 points. How much more is the highest score than the lowest score?
学校举行歌唱比赛，6名评委给五8班评分，如果去掉一个最高分，平均分87分，如果去掉一个最低分，平均分90分，最高分比最低分多多少分？
<gadget id="calculator">90 * 5</gadget>
<output>450</output>

<gadget id="calculator">87 * 5</gadget>
<output>435</output>

<gadget id="calculator">450 - 435</gadget>
<output>15</output>

<result>15</result>