There are 58 story books and 34 popular textbooks in the class book corner. How many books should be put on each shelf on average?
班里图书角有58本故事书、34本科普读物．要放在一个4层的书架上，平均每层要放多少本书？
<gadget id="calculator">58 + 34</gadget>
<output>92</output>

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

<result>23</result>