Evaluate
\frac{1}{1080}\approx 0.000925926
Factor
\frac{1}{2 ^ {3} \cdot 3 ^ {3} \cdot 5} = 0.000925925925925926
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25\times 30^{-3}
Calculate 5 to the power of 2 and get 25.
25\times \frac{1}{27000}
Calculate 30 to the power of -3 and get \frac{1}{27000}.
\frac{1}{1080}
Multiply 25 and \frac{1}{27000} to get \frac{1}{1080}.
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