The school plans to distribute notebooks to the teachers and students of the elementary school, 11 classes, 36 notebooks per class, and 42 notebooks to the teachers. How many laptops should schools buy?
学校准备给小学部师生发笔记本，发给11个班，每班36本，还需要发给老师们42本．学校应买多少本笔记本？
<gadget id="calculator">36 * 11</gadget>
<output>396</output>

<gadget id="calculator">396 + 42</gadget>
<output>438</output>

<result>438</result>