For Beibei's birthday, his mother gave him a set of "Little Cloth Tiger" series, a complete set of 9 books totaling 216 yuan. How much is the average per copy?
贝贝过生日，妈妈送给他一套《小布老虎》丛书，全套9本共216元．平均每本多少元？
<gadget id="calculator">216 / 9</gadget>
<output>24</output>

<result>24</result>