Advertise on a wall with a side length of 12 meters square. It costs 4 yuan per square meter. How much does it cost to make this wall advertisement?
在一面边长是12米正方形的墙上做广告．每平方米需要4元钱，做这个墙体广告一共需要多少钱？
<gadget id="calculator">12 * 12 * 4</gadget>
<output>576</output>

<result>576</result>