The average weight of father and mother is 72 kg, and Xiao Ming's weight is 24 kg. What is the average weight of the three of them?
爸爸、妈妈的平均体重是72千克，小明体重24千克，三人的平均体重是多少千克．
<gadget id="calculator">72 * 2</gadget>
<output>144</output>

<gadget id="calculator">144 + 24</gadget>
<output>168</output>

<gadget id="calculator">168 / 3</gadget>
<output>56</output>

<result>56</result>