There are four numbers, choose three numbers each time to calculate their average, and add another number. Calculated four times with this method, and got four numbers respectively: 86, 92, 100, 106, so what is the average of these four numbers?
有四个数，每次选出三个数算出它们的平均数，再加上另外一个数．用这种方法计算了四次，分别得到四个数：86、92、100、106，那么原来这四个数的平均数是多少
<gadget id="calculator">86 + 92 + 100 + 106</gadget>
<output>384</output>

<gadget id="calculator">384 / 2 / 4</gadget>
<output>48</output>

<result>48</result>