Evaluate
27\pi \approx 84.823001647
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12\pi \times 3^{2}-3^{4}\pi
To multiply powers of the same base, add their exponents. Add 1 and 3 to get 4.
12\pi \times 9-3^{4}\pi
Calculate 3 to the power of 2 and get 9.
108\pi -3^{4}\pi
Multiply 12 and 9 to get 108.
108\pi -81\pi
Calculate 3 to the power of 4 and get 81.
27\pi
Combine 108\pi and -81\pi to get 27\pi .
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