Division - precision

[Rygel via Digitalmars-d-learn]

Hi there. I'm a beginners, so my questions could be silly.

        double x1 = 7.0;
        double x2 = 3.0;
        writeln(x1 / x2);

from this code i get:

2.33333

this is ok but how can i get more digits? For example:

2.333333333.....

thx :-)