For this case we have the following multiplication:

For associative property, we can rewrite the expression as:

Then, by properties of exponents we have:
In the multiplication, if we have the same base, the exponents are added.
Therefore, by rewriting the expression we have:

Finally:

Then, we rewrite the result correctly in scientific notation.
To do this, we move the point one space to the left and increase the degree of the exponent one unit:

Answer:
In scientific notation,
equals