How many square centimeters of cardboard should be used to make a cuboid carton with a length of 6 cm, a width of 5 cm, and a height of 10 cm?
制作一个长6厘米、宽5厘米、高10厘米的长方体纸盒，至少要用多少平方厘米的硬纸板？
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">30 + 60 + 50</gadget>
<output>140</output>

<gadget id="calculator">140 * 2</gadget>
<output>280</output>

<result>280</result>