The new teaching building of the school has 5 floors, each floor has 3 classrooms, and 6 fluorescent lamps are installed in each classroom. How many fluorescent lamps are needed in total?
学校新教学楼有5层，每层有3间教室，每间教室安装了6盏日光灯．一共要多少盏日光灯？
<gadget id="calculator">3 * 5 * 6</gadget>
<output>90</output>

<result>90</result>