Put two cubes whose edge length is 20 cm into a cuboid, what is the surface area of the cuboid in cm**2.
将两个棱长是20厘米的正方体拼成一个长方体，长方体的表面积是多少厘米**2．
<gadget id="calculator">20 * 20 * 6 * 2</gadget>
<output>4_800</output>

<gadget id="calculator">20 * 20 * 2</gadget>
<output>800</output>

<gadget id="calculator">4_800 - 800</gadget>
<output>4_000</output>

<result>4_000</result>