The book city will launch new books during the festival: "Grimm's Fairy Tales" is priced at 38 yuan; "Andersen" is priced at 24 yuan; "The Analects" is priced at 15 yuan; "Zhuangzi" is priced at 15 yuan. How much is the average price of each of these four books?
图书城在节日期间推出新书：《格林童话》售价38元；《安徒生》售价24元；《论语》售价15元；《庄子》售价15元．这四本书平均每本多少元？
<gadget id="calculator">38 + 24 + 15 + 15</gadget>
<output>92</output>

<gadget id="calculator">92 / 4</gadget>
<output>23</output>

<result>23</result>