ROWID Confusion

The following query returns the same number for both relative and absolute file_no. I was expecting the first query to return 1, since it is in the first (and only) file of the tablespace. Can anyone clear up my confusion?

SQL> select dbms_rowid.rowid_relative_fno(rowid)   2 from emp where empno = '7839'
  3 /

DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID)

                                   4

SQL>
SQL> select dbms_rowid.rowid_to_absolute_fno(rowid,'SCOTT','EMP')   2 from emp where empno = '7839'
  3 /

DBMS_ROWID.ROWID_TO_ABSOLUTE_FNO(ROWID,'SCOTT','EMP')

                                                    4