Evaluate
\frac{9\pi }{5}\approx 5.654866776
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\frac{12\times 30}{200}\pi
Divide 60 by 5 to get 12.
\frac{360}{200}\pi
Multiply 12 and 30 to get 360.
\frac{9}{5}\pi
Reduce the fraction \frac{360}{200} to lowest terms by extracting and canceling out 40.
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