Why do I get 3.84 × 10⁻⁴ instead of 3.84 × 10⁶ N/m² for bending stress?

[Gavin Cooper]

How do we get the answer 3.84 x 10^6Nm-2
When I use my calculator I get
3.84 x 10^-4.
See attached PDF.

I guess I'm making a pretty basic error but I don't know what it is.

Thanks
Gavin

 

[Gavin Cooper]

Sorted.
School boy error