Intensity levels

[chattkis3]

A recording engineer works in a soundproofed room that is 43.5 dB quieter than the outside. If the sound intensity in the room is 1.00 10-10 W/m2, what is the intensity outside?

Here is how I THINK I should be solving this problem.

Intensity level = 10dB * log ( I / Io)

Intensity level = 43.5
Io = 1x10^-10

SO

I = 10 ^ { (43.5 + logIo)/10 }

The computer is telling me I am wrong, can anyone help please? Thanks a lot!

[eridanus]

I = (1e-10)10^(43.5/10)