Evaluate
\frac{100000}{\pi }\approx 31830.988618379
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\frac{1.2}{4\times 30\pi \times 10^{-7}}
Cancel out 15 in both numerator and denominator.
\frac{1.2}{120\pi \times 10^{-7}}
Multiply 4 and 30 to get 120.
\frac{1.2}{120\pi \times \frac{1}{10000000}}
Calculate 10 to the power of -7 and get \frac{1}{10000000}.
\frac{1.2}{\frac{3}{250000}\pi }
Multiply 120 and \frac{1}{10000000} to get \frac{3}{250000}.
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