cuboid biscuit box with a length of 17 cm, a width of 15 cm, and a height of 20 cm, if a circle of label paper is pasted on its side, how many square centimeters does this label paper need at least?
一个长17厘米，宽15厘米，高20厘米，的长方体饼干盒，如果在它的侧面贴上一圈商标纸，这张商标纸至少需要多少平方厘米？
<gadget id="calculator">17 * 20</gadget>
<output>340</output>

<gadget id="calculator">15 * 20</gadget>
<output>300</output>

<gadget id="calculator">340 + 300</gadget>
<output>640</output>

<gadget id="calculator">640 * 2</gadget>
<output>1_280</output>

<result>1_280</result>