A mirror with a length of 4 meters and a width of 2 meters is to be installed in the hall of the school teaching building. The price of the mirror is 16 yuan per square meter. How much does it cost to buy this mirror?
学校教学楼大厅中要安装一面长4米宽2米的镜子，镜子的价格是每平方米16元，买这面镜子需要多少钱？
<gadget id="calculator">4 * 2 * 16</gadget>
<output>128</output>

<result>128</result>