\left\{ \begin{array} { l } { x = n \times B } \\ { n = 2 \times 10 ^ { - 10 } } \\ { B = 2 \times 10 ^ { 6 } } \end{array} \right.
Solve for x, n, B
x=\frac{1}{2500}=0.0004
n=\frac{1}{5000000000}=2 \cdot 10^{-10}
B=2000000
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