Simplify negative sign.
\[640\times 100000\times \frac{}{12000000}\]
Use this rule: \(\frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}\).
\[\frac{640\times 100000}{12000000}\]
Simplify \(640\times 100000\) to \(64000000\).
\[\frac{64000000}{12000000}\]
(64000000*)/12000000
