There are 4 volumes of "New Collection of Fairy Tales", priced at 26.8 yuan. How much is the average price per copy? What is the correct column
《新编童话集》共4本，售价26.8元．平均每本售价多少元？列式正确的是多少
<gadget id="calculator">26.8 / 4</gadget>
<output>6.7</output>

<result>6.7</result>