Evaluate
\frac{\pi }{1000000}\approx 0.000003142
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0.5\times \frac{1}{1000000}\times 2\pi
Calculate 10 to the power of -6 and get \frac{1}{1000000}.
\frac{1}{2000000}\times 2\pi
Multiply 0.5 and \frac{1}{1000000} to get \frac{1}{2000000}.
\frac{1}{1000000}\pi
Multiply \frac{1}{2000000} and 2 to get \frac{1}{1000000}.
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