A cuboid iron box containing biscuits, the bottom surface is a square with a side length of 12 cm, and a height of 30 cm. A circle of trademark paper is pasted around the iron box (the joint is 30 square centimeters). What is the area of the trademark in square centimeters?
一个装饼干的长方体铁盒，底面是边长为12厘米的正方形，高是30厘米，这个铁盒四周贴一圈商标纸(接头为30平方厘米)，商标的面积是多少平方厘米？
<gadget id="calculator">12 * 4 * 30</gadget>
<output>1_440</output>

<gadget id="calculator">1_440 + 30</gadget>
<output>1_470</output>

<result>1_470</result>