There are three numbers A, B, and C. The average of the two numbers A and B is 85, and the number C is 79. What is the average of the three numbers A, B, and C?
有甲、乙、丙三个数，甲、乙两数的平均数是85，丙数是79，甲、乙、丙三数的平均数是多少？
<gadget id="calculator">85 * 2</gadget>
<output>170</output>

<gadget id="calculator">170 + 79</gadget>
<output>249</output>

<gadget id="calculator">249 / 3</gadget>
<output>83</output>

<result>83</result>