There are three numbers A, B, and C, and the averages of A, B, B, C, C, and A are known to be 40, 46, and 43 respectively, so what is the average of the three numbers A, B, and C ．
有甲、乙、丙三个数，已知甲、乙；乙、丙；丙、甲两数的平均数分别为40、46、43，那么甲、乙、丙三个数的平均数是多少．
<gadget id="calculator">40 + 46 + 43</gadget>
<output>129</output>

<gadget id="calculator">129 / 3</gadget>
<output>43</output>

<result>43</result>