If a cube with a surface area of 84 square centimeters is cut into three equal cuboids, what is the sum of the surface areas of these three cuboids?
将表面积是84平方厘米的正方体，切成三个相同的长方体，这三个长方体的表面积之和是多少平方厘米．
<gadget id="calculator">84 / 6</gadget>
<output>14</output>

<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<gadget id="calculator">84 + 56</gadget>
<output>140</output>

<result>140</result>