The teaching building has 4 floors, and each floor has 8 classrooms. Each classroom needs to be equipped with 5 lamps. How many lamps are installed in total?
教学楼有4层，每层有8个教室，每个教室要装5盏灯，一共装多少盏灯？
<gadget id="calculator">5 * 8 * 4</gadget>
<output>160</output>

<result>160</result>