A set of data is arranged in ascending order of 6, 2, 3, □, □, 9, 20, the median is 7, and what is the average.
一组数据从小到大排列共6个，2，3，□，□，9，20，中位数是7，平均数是多少．
<gadget id="calculator">2 + 3 + 14 + 9 + 20</gadget>
<output>48</output>

<gadget id="calculator">48 / 6</gadget>
<output>8</output>

<result>8</result>