If a cuboid with a length of 5 cm, a width of 4 cm, and a height of 3 cm is divided into two smaller cuboids, what is the maximum increase in the surface area in square centimeters?
把一个长5厘米，宽4厘米，高3厘米的长方体分成两个小长方体后，表面积最多增加多少平方厘米．
<gadget id="calculator">5 * 4 * 2</gadget>
<output>40</output>

<result>40</result>