<p> problem

When I write this:

It is looking like this:


And when I read from database its:
empty row
Evo jedna rečenica bla bla bla.
Ovo je novi red
empty row

Why. It should be:

"Evo jedna rečenica bla bla bla.
Ovo je novi red."

I tried with this (in CSS):

p {
   margin: 0px;
   padding: 0px;
}

But it's not ok.