Result Error

Hi, im new in this forum, so actually, I guess this is the right section, and I guess that I'm not doing anything wrong.

Well.

I was working in a project, and everything was alright, until I got this as a result from a numeric expression:

1E-05

And I was like: ??????????

So, my question is: what is this and why is this showing up?

The expression is: n2 = n1 * (10 ^ -5)
If I input 1 as n2, it shows up this ****** message.

Can anyone help me? I would be VERY grateful, because I need get this ready until tomorrow.

Thanks.