If a cuboid with a length of 3 cm, a width of 4 cm and a height of 5 cm is cut into two cuboids, what is the maximum increase in the surface area in cm**2.
把一个长3cm、宽4cm、高5cm的长方体截成两个长方体，表面积最多增加多少cm**2．
<gadget id="calculator">5 * 4 * 2</gadget>
<output>40</output>

<result>40</result>