A cuboid food box is 20cm long, 15cm wide, and 30cm high. If a circle of trademark paper is pasted around it (not pasted on the top and bottom), what is the minimum area of this trademark paper in square centimeters?
一个长方体的食品盒，长20cm，宽15cm，高30cm．如果围着它贴一圈商标纸(上下面不贴)，这张商标纸的面积至少是多少平方厘米？
<gadget id="calculator">20 * 30</gadget>
<output>600</output>

<gadget id="calculator">15 * 30</gadget>
<output>450</output>

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

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

<result>2_100</result>