oracle – Why logical reads are high

I have a table with 999 rows in 24 blocks.Ran a first SQL query that performs a full scan of the table. According to the running statistics, it shows 87 LIOS I do not understand why LIOS is high, it's like if Oracle was reading all the blocks close to 3 times

Here the size is 500

                SQL> select * from v $ version;

BANNER
-------------------------------------------------- ------------------------------
Oracle Database 11g Enterprise Edition Version 11.2.0.1.0 - 64-bit Production
PL / SQL Version 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for 64-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

SQL> select num_rows, blocks, empty_blocks in user_tables
2 where table_name looks like SALE_TAB & # 39 ;;

NUM_ROWS BLOCKS EMPTY_BLOCKS
---------- ---------- ------------
999 24 0

SQL> @x
View the execution plan of the last statement of this session from the library cache ...

PLAN_TABLE_OUTPUT
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- ------------------------------
SQL_ID ap1xwwqvvbfyd, child number 0
-------------------------------------
select * from sale_tab

The hash value of the plan: 2430023251

-------------------------------------------------- -------------------------------------------------- ------------------
| Id | Operation | Name | Start | E-Rows | E-Bytes | Cost (% CPU) | A-Rows | A-Time | Stamps | Bed |
-------------------------------------------------- -------------------------------------------------- ------------------
| 0 | SELECT THE DECLARATION | | 1 | | | 8 (100) | 999 | 00: 00: 00.02 | 25 | 21 |
| 1 | FULL TABLE ACCESS | SALE_TAB | 1 | 999 | 91908 | 8 (0) | 999 | 00: 00: 00.02 | 25 | 21 |
-------------------------------------------------- -------------------------------------------------- ------------------


13 lines selected.

SQL> @sql_id ap1xwwqvvbfyd%
Show SQL text, child cursors, and runtime statistics for SQLID ap1xwwqvvbfyd child%

HASH_VALUE CH # SQL_TEXT
---------- ---- ------------------------------------ ---- ---------------------------------------------- ---- ---------------------------------------------- ---- --------------
3082140621 0 select * from sale_tab


CH # PARENT_HANDLE OBJECT_HANDLE PLAN_HASH PARSES H_PARSES EXECUTIONS FETCHES ROWS_PROCESSED CPU_MS ELA_MS LIOS PIOS SORTS USERS_EXECUTING
---- ---------------- ---------------- ---------- ---- ------ ---------- ---------- ---------- -------------- ---------- ---------- ---------- ---------- ---------- ---------------
0 00007FFD911A4238 00007FFD9C847038 2430023251 1 1 3 999 15.625 37.842 87 22 0 0