On Children's Day, the fourth grade young pioneers donated books to the children in the disaster area. There are 3 classes in the fourth grade, with 45 students in each class, and a total of 810 books were donated. How many books are donated by each person on average?
六一儿童节中，四年级少先队员为灾区小朋友捐书．四年级有3个班，每班45人，共捐了810本，平均每人捐多少本？
<gadget id="calculator">810 / 3 / 45</gadget>
<output>6</output>

<result>6</result>