A box of biscuits is 20cm long, 15cm wide, and 30cm high. Label paper should be pasted around it. What is the minimum area of this label paper in square centimeters?
一盒饼干长20cm，宽15cm，高30cm，要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">30 * 15</gadget>
<output>450</output>

<gadget id="calculator">20 * 30</gadget>
<output>600</output>

<gadget id="calculator">450 + 600</gadget>
<output>1_050</output>

<gadget id="calculator">1_050 * 2</gadget>
<output>2_100</output>

<result>2_100</result>