3(64p)3

Rewrite 64 as 82.

382p3

Pull terms out from under the radical.

3(8p)3

Apply the product rule to 8p.

3(83p3)

Raise 8 to the power of 3.

3(512p3)

3(512p3)

Rewrite p3 as (p3)12.

3(512p3)

Factor out p2.

3(512p2p)

Pull terms out from under the radical.

3(512(pp))

Multiply 512 by 3.

1536pp

Simplify 3( square root of 64p)^3