8.1 x 10/2.7 x 10

To solve this expression, we can simply multiply the numbers as they are, using the rules of scientific notation:

8.1 x 10/2.7 x 10

= (8.1/2.7) x (10 x 10)

= 3 x 100

= 300.

Therefore, 8.1 / 2.7 x 10 is equal to 300.