The school needs to buy exercise books. If there are 16 classes and an average of 150 books are distributed to each class, how many exercise books are needed in total?
学校要买练习本．如果16个班，每班平均配发150本，一共要练习本多少本？
<gadget id="calculator">150 * 16</gadget>
<output>2_400</output>

<result>2_400</result>