It is known that the average of the three numbers A, B, and C is 268, and the number D is 148. What is the average of these four numbers?
已知甲、乙、丙三个数的平均数是268，丁数为148，求这四个数的平均数是多少？
<gadget id="calculator">268 * 3</gadget>
<output>804</output>

<gadget id="calculator">804 + 148</gadget>
<output>952</output>

<gadget id="calculator">952 / 4</gadget>
<output>238</output>

<result>238</result>