There is a 3*4*5 cuboid, first dye the two adjacent faces red, and then cut it into 60 small cubes of 1*1*1. I would like to ask: How many of these small cubes have exactly one side dyed red?
有一个3*4*5的长方体，先把其中相邻的两个面染红，再把它切成60个1*1*1的小正方体．请问：这些小正方体中最多有多少个是恰有一面被染红的？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">15 - 10</gadget>
<output>5</output>

<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<result>25</result>