There are 2 classes in the third grade, each class has 45 students. The school needs to distribute 6 homework books to each student in the third grade. How many homework books should be distributed in total?
三年级共有2个班，每班有45名学生．学校要给三年级每名学生发6本作业本，一共要发多少本？
<gadget id="calculator">45 * 2 * 6</gadget>
<output>540</output>

<result>540</result>