There is a tea box in the shape of a cuboid, the length and width are 20cm, and the height is 30cm. Stick label paper around it, what is the minimum square centimeter area of this label paper?
有一个长方体形状的茶叶盒，长和宽都是20cm，高是30cm．在它的四周贴上商标纸，这张商标纸的面积至少是多少平方厘米？
<gadget id="calculator">20 * 4 * 30</gadget>
<output>2_400</output>

<result>2_400</result>