Calculating Net Electric Flux through Submarine Hull: E&M Homework Question

[JustHere155]

Homework Statement

The following charges are located inside a submarine: 2.00 µC, -9.00 µC, 27.0 µC, and -54.0 µC.
(a) Calculate the net electric flux through the hull of the submarine.

Homework Equations

Flux = q/e0

The Attempt at a Solution

I found the net charge, which happens to be -34e-6. So, I plugged the numbers into the equation and I keep getting the wrong answer. My answer was 3841807.91 N*m^2/C.
I am running out of ideas

 

[ehild]

You forgot the sign. The number is correct, but you need to give it with three significant digits.

ehild