The two boxes are 30cm long and 15cm wide. What is the minimum area of wrapping paper in cm**2 for a gift box with a height of 8cm?
为两盒长30cm，宽15cm．高8cm的礼品盒包装，采用包装纸的面积最少是多少cm**2．
<gadget id="calculator">15 * 30</gadget>
<output>450</output>

<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">30 * 8</gadget>
<output>240</output>

<gadget id="calculator">450 + 120 + 240</gadget>
<output>810</output>

<gadget id="calculator">810 * 2 * 2</gadget>
<output>3_240</output>

<gadget id="calculator">15 * 30 * 2</gadget>
<output>900</output>

<gadget id="calculator">3_240 - 900</gadget>
<output>2_340</output>

<result>2_340</result>