The teaching building of Guangming Primary School has 3 floors, each floor has 12 classrooms, and each classroom is equipped with 12 fluorescent lamps. How many fluorescent lamps are installed in these classrooms? (column comprehensive formula)
光明小学教学楼有3层，每层有12间教室，每间教室安装12盏日光灯．这些教室一共安装多少盏日光灯？(列综合算式)
<gadget id="calculator">12 * 3 * 12</gadget>
<output>432</output>

<result>432</result>