If a cuboid with a length of 6 cm, a width of 5 cm, and a height of 4 cm is cut open, what is the maximum increase in the surface area in square centimeters?
把一个长6厘米、宽5厘米、高4厘米的长方体切开后，表面积最大可增长多少平方厘米．
<gadget id="calculator">6 * 5 * 2</gadget>
<output>60</output>

<result>60</result>