ANSWER:
1.8176 * 10^-20 m^3
Explanation:
Given:
Wide = 0.000000284 m
Long = 0.000000025 m
High = 0.00000256 m
Because it is rectangular in shape, the volume is the product of the three measurements, just like this:

The volume is 1.8176 * 10^-20 cubic meters