Paint It And Disassemble It

Geometry Level 1

The above is a wooden cube block of size 7×7×77\times 7\times 7, whose outer faces are painted in blue.

Now, the whole block is cut into smaller cubes 1×1×11\times1\times1.

How many 1×1×11\times 1\times1 cubes have precisely 1 of its faces painted blue?

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