To solve:

3×10tothepower8/5×10tothepower9

Is this what you mean?

(3 * 10^8) / (5 * 10^9) =

Ooops. Sorry...

https://www.google.com/#q=(3+*+10^8)+/+(5+*+10^9)+%3D

To solve the expression (3 × 10^8) / (5 × 10^9), we can simplify it step by step.

Step 1: Multiply the numerators (3 × 10^8) and the denominators (5 × 10^9) separately.
Numerator: 3 × 10^8 = 3 × 100,000,000 = 300,000,000
Denominator: 5 × 10^9 = 5 × 1,000,000,000 = 5,000,000,000

Step 2: Divide the numerator by the denominator.
300,000,000 / 5,000,000,000 = 0.06

So, the result of (3 × 10^8) / (5 × 10^9) is 0.06.