The average of the four numbers A, B, C, D is 106, and the average of the three numbers A, B, C, and D is 110. What is the number of D?
甲乙丙丁四个数的平均数是106，甲乙丙三个数的平均数是110，丁数是多少．
<gadget id="calculator">106 * 4</gadget>
<output>424</output>

<gadget id="calculator">110 * 3</gadget>
<output>330</output>

<gadget id="calculator">424 - 330</gadget>
<output>94</output>

<result>94</result>