Evaluate
54\pi \approx 169.646003294
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\frac{1}{2}\times 144\times \frac{3\pi }{4}
Calculate 12 to the power of 2 and get 144.
\frac{144}{2}\times \frac{3\pi }{4}
Multiply \frac{1}{2} and 144 to get \frac{144}{2}.
72\times \frac{3\pi }{4}
Divide 144 by 2 to get 72.
18\times 3\pi
Cancel out 4, the greatest common factor in 72 and 4.
54\pi
Multiply 18 and 3 to get 54.
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