Guangming Primary School has 6 grades, each grade has 2 classes, with an average of 54 students in each class. How many students are there in Guangming Primary School?
光明小学有6个年级，每个年级有2个班，平均每班54名学生．光明小学共有多少名学生？
<gadget id="calculator">2 * 6 * 54</gadget>
<output>648</output>

<result>648</result>