How many square centimeters will the surface area be reduced if two cubes with sides of 10 cm long are put together to form a cuboid?
把两个棱长都是10厘米的正方体拼成一个长方体后，表面积减少多少平方厘米．
<gadget id="calculator">10 * 10 * 2</gadget>
<output>200</output>

<result>200</result>