Evaluate
\frac{960\pi }{611}\approx 4.936053924
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\frac{12\times 40}{611}\pi \times 2
Express 12\times \frac{40}{611} as a single fraction.
\frac{480}{611}\pi \times 2
Multiply 12 and 40 to get 480.
\frac{480\times 2}{611}\pi
Express \frac{480}{611}\times 2 as a single fraction.
\frac{960}{611}\pi
Multiply 480 and 2 to get 960.
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