1  with t as (
  2  select  3 CNT, 15 TOTAL from dual union all
  3  select  6,24 from dual
  4  )
  5  select 1 one, total/cnt a, rn
  6* from t, xmltable('1 to xs:integer($n)' passing cnt as "n" columns rn number path '.' )
SQL> /

       ONE          A         RN
---------- ---------- ----------
         1          5          1
         1          5          2
         1          5          3
         1          4          1
         1          4          2
         1          4          3
         1          4          4
         1          4          5
         1          4          6

9 rows selected.