A cuboid biscuit box is 18 cm long, 12 cm wide, and 20 cm high. If it is covered with wrapping paper on its side, what is the minimum area of the wrapping paper in square centimeters?
一个长方体饼干盒，长18厘米，宽12厘米，高20厘米．如果在它的侧面满包装纸，包装纸的面积至少有多少平方厘米．
<gadget id="calculator">18 * 20 * 2</gadget>
<output>720</output>

<gadget id="calculator">12 * 20 * 2</gadget>
<output>480</output>

<gadget id="calculator">720 + 480</gadget>
<output>1_200</output>

<result>1_200</result>