Evaluate
-\frac{1}{500000000000000000}=-2 \cdot 10^{-18}
Factor
-\frac{1}{500000000000000000} = -2 \times 10^{-18}
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-2\times \frac{1}{1000000000000000000}
Calculate 10 to the power of -18 and get \frac{1}{1000000000000000000}.
-\frac{1}{500000000000000000}
Multiply -2 and \frac{1}{1000000000000000000} to get -\frac{1}{500000000000000000}.
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