Calculating Energy Crossing Area in Uniform Fields

[Kris1120]

Homework Statement

In a certain region of space, there is a uniform magnetic field B = 4.49 × 10−5 T, parallel to the x-axis, and a uniform electric field E = 10.2 V/m, parallel to the y-axis.
The permeability of free space is 4 pi ×10−7 N · m2.
At what rate does energy cross a square area, 0.65 cm on a side, that is perpendicular
to the z-axis?
Answer in units of W.

Homework Equations

I = EB / permeability

P = IA

The Attempt at a Solution

I = (10.2 V/m)(4.49 e-5)/ (4*pi*e-7)
=364.449 A

P=(364.449 A) (0.0065 m)
=2.36892 W

This answer is not right when I plug it into my online homework answers. :(

 

[Redbelly98]

What is the area of the square?