Using three cuboids whose length, width and height are 5 cm, 3 cm and 4 cm respectively to form a larger cuboid, what is the maximum reduction in surface area in square centimeters?
用三个长、宽、高分别是5厘米、3厘米、4厘米的长方体拼成一个较大的长方体，表面积最多减少多少平方厘米．
<gadget id="calculator">5 * 4 * 4</gadget>
<output>80</output>

<result>80</result>