A, B, C, D 4 numbers, one number is removed each time, and the remaining 3 numbers are averaged, and this is calculated 4 times, and the following 4 numbers are obtained: 28, 31, 35, 38, then A, B, C, What is the average of the 4 numbers in D.
A、B、C、D4个数，每次去掉一个数，将其余3个数求平均数，这样计算了4次，得到下面4个数：28，31，35，38，则A、B、C、D4个数的平均数是多少．
<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">31 * 3</gadget>
<output>93</output>

<gadget id="calculator">35 * 3</gadget>
<output>105</output>

<gadget id="calculator">38 * 3</gadget>
<output>114</output>

<gadget id="calculator">84 + 93 + 105 + 114</gadget>
<output>396</output>

<gadget id="calculator">396 / 3</gadget>
<output>132</output>

<gadget id="calculator">132 / 4</gadget>
<output>33</output>

<result>33</result>