Dig a small cube with a side length of 1 cm in the center of the front, back, top and bottom, and left and right sides of a cube with a side length of 5 cm. In this way, how many square centimeters will the surface area increase?
在一个棱长为5厘米的正方体的前后、上下、左右六个面的中心位置各挖一个棱长为1厘米的小正方体，这样，表面积增加多少平方厘米？
<gadget id="calculator">1 * 1 * 4 * 6</gadget>
<output>24</output>

<result>24</result>