Evaluate
36\pi \approx 113.097335529
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\frac{1}{9}\pi \times 18^{2}
Reduce the fraction \frac{40}{360} to lowest terms by extracting and canceling out 40.
\frac{1}{9}\pi \times 324
Calculate 18 to the power of 2 and get 324.
\frac{324}{9}\pi
Multiply \frac{1}{9} and 324 to get \frac{324}{9}.
36\pi
Divide 324 by 9 to get 36.
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