Evaluate
\frac{16\pi }{15}\approx 3.351032164
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\frac{2\times 8\pi }{3\times 5}
Multiply \frac{2}{3} times \frac{8\pi }{5} by multiplying numerator times numerator and denominator times denominator.
\frac{16\pi }{3\times 5}
Multiply 2 and 8 to get 16.
\frac{16\pi }{15}
Multiply 3 and 5 to get 15.
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