A string of numbers such as: 3, 8, 14, 9, how much, 25. How many blanks should be filled in so that the average of this group of numbers is 11?
一串数字如：3，8，14，9，多少，25．要使这组数的平均数为11，空格处应该填多少？
<gadget id="calculator">11 * 6</gadget>
<output>66</output>

<gadget id="calculator">3 + 8 + 14 + 9 + 25</gadget>
<output>59</output>

<gadget id="calculator">66 - 59</gadget>
<output>7</output>

<result>7</result>