After a cuboid is cut off to a cuboid with a height of 8 cm, the remaining part is a cube. The surface area of the cube is 320 cm2 less than that of the original cuboid. Find the surface area of the original cuboid.
把一个长方体截去一个高为8厘米的长方体后，剩下的部分是一个正方体．正方体的表面积比原来长方体的表面积减少320平方厘米．求原来长方体的表面积．
<gadget id="calculator">320 / 4 / 8</gadget>
<output>10</output>

<gadget id="calculator">10 * 10 * 6</gadget>
<output>600</output>

<gadget id="calculator">600 + 320</gadget>
<output>920</output>

<result>920</result>