The school should install an electronic display board with a length of 5.4 meters and a width of 2.5 meters above the gate. What is the area of this electronic display board?
学校要在大门的上方安装一块长5.4米、宽2.5米的电子显示牌．这块电子显示牌的面积是多少？
<gadget id="calculator">5.4 * 2.5</gadget>
<output>13.5</output>

<result>13.5</result>