Roxas? Okay, well... here we go.

1) What is the distance from the Sun to Pluto? It's 395 AU.

Now, 1 AU = 150,000,000 km

395 AU = 395 x 150,000,000 km = ?

Can you find this first in ordinary number?

2) What does "x 10^-3" mean? Do you know what does "x 10" mean?

3) Do it as follows:

Divide 2.7 by 3.375

Then, subtract the power of the 10 in the denominator from the power of 10 in the numerator.

Post what you've got so far.