Students from 15 classes participate in the broadcast gymnastics competition. Each class is arranged in 4 groups, each group has 12 people. How many students participate in the broadcast gymnastics competition?
15个班的同学参加广播体操比赛，每个班排成4组，每组12人，参加广播体操比赛的学生有多少名．
<gadget id="calculator">15 * 4 * 12</gadget>
<output>720</output>

<result>720</result>