Evaluate
\frac{231\pi }{20000}\approx 0.036285395
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\pi \times 3.5\times \frac{1}{100}\times 0.33
Calculate 10 to the power of -2 and get \frac{1}{100}.
\pi \times \frac{7}{200}\times 0.33
Multiply 3.5 and \frac{1}{100} to get \frac{7}{200}.
\pi \times \frac{231}{20000}
Multiply \frac{7}{200} and 0.33 to get \frac{231}{20000}.
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