If a cuboid with a length of 30 cm, a width of 20 cm, and a height of 10 cm is divided into two identical small cuboids, what is the maximum increase in its surface area in square centimeters?
将一个长30厘米，宽20厘米，高10厘米长方体木块分割成两个完全相同的小长方体后，它的表面积最多可以增加多少平方厘米．
<gadget id="calculator">30 * 20 * 2</gadget>
<output>1_200</output>

<result>1_200</result>