A square wooden block is 8 cm long, and a hole is dug in the center of each face. The hole is a square with a side length of 3 cm and a depth of 3 cm. What is the surface area of the block after digging?
一个正方体木块棱长8厘米，在每个面的中央各挖掉一个洞，洞口是边长3厘米的正方形，洞深3厘米．挖好后的木块表面积是多少？
<gadget id="calculator">8 * 8 * 6</gadget>
<output>384</output>

<gadget id="calculator">3 * 3 * 4 * 6</gadget>
<output>216</output>

<gadget id="calculator">384 + 216</gadget>
<output>600</output>

<result>600</result>