Evaluate
\frac{231\pi }{5}\approx 145.141580596
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\pi \times 37.2+\pi \times 3^{2}
Multiply 3 and 12.4 to get 37.2.
\pi \times 37.2+\pi \times 9
Calculate 3 to the power of 2 and get 9.
46.2\pi
Combine \pi \times 37.2 and \pi \times 9 to get 46.2\pi .
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