need to understand merge join cartesian plan

I have a excerpt for a execution plan that look like below  which i got from dbms.xplan display cursor and would like to know why when the merge join cartesian happens Oracle estimate that the will be only 1 row return should it not be 36080 * 1 = 36080 as this is a Cartesian join the Db version is 10.2.0.3

| 4 | MERGE JOIN CARTESIAN |

                 |     1    |    63    |   252K  (1)| 00:42:57 |


|       |

|   5 |      TABLE ACCESS FULL                | GL_CODE_COMBINATIONS |

36080 |  1761K|   176   (2)  | 00:00:02 |       |       |


|   6 |      BUFFER SORT                          |

                         |     1   |    13    |    18E(100)|999:59:59


|       |       |

|   7 |       VIEW                                        | VW_NSO_1

                       |     1 |    13 |     7   (0)| 00:00:01 |


|       |

thanks

Joshua

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