The school is going to distribute exercise books to 16 classes, each class has 144 copies, and 80 copies need to be kept 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144本，还需要留80本作为备用，学校应买多少本练习本？
<gadget id="calculator">144 * 16</gadget>
<output>2_304</output>

<gadget id="calculator">2_304 + 80</gadget>
<output>2_384</output>

<result>2_384</result>