Datong University built a new teaching building with 15 floors, each floor has 12 classrooms. If 24 sets of desks and chairs are placed in each classroom, how many sets of desks and chairs are needed in total? (two ways to answer)
大同大学新建了一幢15层的教学楼，每层有12个教室．如果每个教室放24套桌椅，一共需要多少套桌椅？(两种方法解答)
<gadget id="calculator">12 * 15 * 24</gadget>
<output>4_320</output>

<result>4_320</result>