Xiao Hua weighs 40 kg, Xiao Fang weighs 42 kg, Xiao Hong weighs 38 kg, and Xiao Li weighs 52 kg. What is the average weight of the four of them in kilograms?
小华的体重是40千克，小芳的体重是42千克，小红的体重是38千克，小丽的体重是52千克．她们四人的平均体重是多少千克？
<gadget id="calculator">40 + 42 + 38 + 52</gadget>
<output>172</output>

<gadget id="calculator">172 / 4</gadget>
<output>43</output>

<result>43</result>