There are four numbers, choose three of them each time, calculate their average, add another number, calculate four times in this way, and get four numbers respectively: 286, 292, 300, 306 , then what is the average of the original four numbers.
有四个数，每次选取其中的三个数，算出它们的平均数，再加上另外的一个数，用这种方法计算了四次，分别得到四个数：286，292，300，306，那么原来的四个数的平均数是多少．
<gadget id="calculator">286 + 292 + 300 + 306</gadget>
<output>1_184</output>

<gadget id="calculator">1_184 / 2 / 4</gadget>
<output>148</output>

<result>148</result>