Evaluate
\frac{3\pi }{4}\approx 2.35619449
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\frac{18\times 15\pi }{360}
Multiply 2 and 9 to get 18.
\frac{270\pi }{360}
Multiply 18 and 15 to get 270.
\frac{3}{4}\pi
Divide 270\pi by 360 to get \frac{3}{4}\pi .
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