The students donated books to the school library. 46 people from Class 4 and Class 2 donated 135 books, and 40 people from Class 4 and 1 donated 123 books. How many books did each person donate on average in the two classes?
同学们为学校图书馆捐书，四2班46人捐了135本，四1班40人捐了123本，两个班平均每人捐了多少本．
<gadget id="calculator">135 + 123</gadget>
<output>258</output>

<gadget id="calculator">40 + 46</gadget>
<output>86</output>

<gadget id="calculator">258 / 86</gadget>
<output>3</output>

<result>3</result>