Evaluate
\frac{1}{25000000000000000}=4 \cdot 10^{-17}
Factor
\frac{1}{2 ^ {15} \cdot 5 ^ {17}} = 4 \times 10^{-17}
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400\times 10^{-19}
Multiply 25 and 16 to get 400.
400\times \frac{1}{10000000000000000000}
Calculate 10 to the power of -19 and get \frac{1}{10000000000000000000}.
\frac{1}{25000000000000000}
Multiply 400 and \frac{1}{10000000000000000000} to get \frac{1}{25000000000000000}.
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