The school is going to distribute exercise books to 16 classes, each class has 150 copies, and the school needs to keep 60 copies as spares. How many exercise books should the school buy?
学校准备发练习本，发给16个班，每班150本，学校还需要留60本作为备用，学校应买多少本练习本？
<gadget id="calculator">150 * 16</gadget>
<output>2_400</output>

<gadget id="calculator">2_400 + 60</gadget>
<output>2_460</output>

<result>2_460</result>