The school launched a book donation activity for Hope Primary School. There are 6 grades in the school, each grade has 4 classes, and an average of 50 books are donated per class. How many books were donated in total?
学校开展为希望小学捐书的活动，全校有6个年级，每个年级4个班，平均每班捐书50本．一共捐书多少本？
<gadget id="calculator">6 * 4 * 50</gadget>
<output>1_200</output>

<result>1_200</result>