The number A is 52, the average of the two numbers B and C is 61, what is the average of the three numbers A, B, and C?
甲数是52，乙、丙两数的平均数是61，甲、乙、丙三个数的平均数是多少．
<gadget id="calculator">61 * 2</gadget>
<output>122</output>

<gadget id="calculator">122 + 52</gadget>
<output>174</output>

<gadget id="calculator">174 / 3</gadget>
<output>58</output>

<result>58</result>