Evaluate
\frac{\pi }{8640}\approx 0.00036361
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\frac{\pi }{12\times 12\times 60}
Cancel out 5 in both numerator and denominator.
\frac{\pi }{144\times 60}
Multiply 12 and 12 to get 144.
\frac{\pi }{8640}
Multiply 144 and 60 to get 8640.
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