0/0064 Gs=? Ms

We need to convert Gigaseconds (Gs) to Megaseconds (Ms).
The prefixes Giga (G) and Mega (M) represent powers of 10:
1 Giga = $10^9$
1 Mega = $10^6$

To convert from Gs to Ms, we can set up a ratio:
$1\ \text{Gs} = 1 \times 10^9\ \text{s}$
$1\ \text{Ms} = 1 \times 10^6\ \text{s}$

Therefore, $1\ \text{Gs} = \frac{10^9\ \text{s}}{10^6\ \text{s}}\ \text{Ms} = 10^{9-6}\ \text{Ms} = 10^3\ \text{Ms}$
So, $1\ \text{Gs} = 1000\ \text{Ms}$.

Multiply the given value in Gs by the conversion factor:
$0.0064\ \text{Gs} \times \frac{1000\ \text{Ms}}{1\ \text{Gs}}$
$0.0064 \times 1000\ \text{Ms} = 6.4\ \text{Ms}$

The final answer is $6.4\ \text{Ms}$.