Regarding to Jay suggestion i open a new topic.
Do you know how i can set in arcgis 9.3 coordinates only with one locus after comma, i mean like that format: xx xx xx,x not like i have now xx xx xx,xxx (screen below)
This is possible in two different ways.
I see that this is not an excel (event) table so these values are not used to locate the points they are simply a record of the location (an external table with xy values does locate the point when formatted as an event table). You will see in the calculate geometry dialog that there are several choices for how to calculate. The units is determined by the CRS of the MXD you have open.
NOTE: to format an external table (XLS, DBF, MDB, CSV, TXT.) with xy values you select the table in the source tab of TOC and select Display XY Data. You would then select the coordinate system your data is in (usually going to be [geographic system WGS84]) lat lon.
Within the MXD file right click on the point feature class and choose properties. Next Select the fields tab. You should now see a listing of all the fields associated with you feature class. Find your fields dlugosc and szerokosc in the list. If you click on the box with the ellipse under number formatting you can control how the numbers appear in both the table view as well as labels for each field independently. Since this is done within the mxd it only applies to the current map document. If you want to make this change permanently to the data set in question you will need to define a field with your parameters for number of significant zeros, etc and calculate the existing values from the existing to new field.