Evaluate
\frac{125}{2\pi }\approx 19.894367886
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\frac{0.1\times 4}{\pi \times 0.08^{2}}
Divide 0.1 by \frac{\pi \times 0.08^{2}}{4} by multiplying 0.1 by the reciprocal of \frac{\pi \times 0.08^{2}}{4}.
\frac{0.4}{\pi \times 0.08^{2}}
Multiply 0.1 and 4 to get 0.4.
\frac{0.4}{\pi \times 0.0064}
Calculate 0.08 to the power of 2 and get 0.0064.
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