When kindergartens buy toys, the first class buys 45, the second class buys 36, and the third class has 15 more toys than the second class. How many toys do each class buy on average?
幼儿园买玩具，一班买45件，二班买36件，三班比二班多15件，平均每个班买玩具几件？
<gadget id="calculator">36 + 15</gadget>
<output>51</output>

<gadget id="calculator">45 + 36 + 51</gadget>
<output>132</output>

<gadget id="calculator">132 / 3</gadget>
<output>44</output>

<result>44</result>