A * B = C
Example: A = 1
B=3
Output: 
1 * 1 = 1
1* 2 = 2
1* 3 = 3

orclz>
orclz> select rownum from dual connect by level <=12;

    ROWNUM
----------
         1
         2
         3
         4
         5
         6
         7
         8
         9
        10
        11
        12

12 rows selected.

orclz>

declare
n number(5);
i number(2);
m number(5);
limit number(5);
begin
i:=1;
n:=&n;  -- The number for which multiplication table should be printed.
limit:=&l;  -- This specifies the limit of the table.
dbms_output.put_line('Multiplication table for '|| n);
for i in 1..limit
loop
m:=n*i;
dbms_output.put_line(n||'*'||i||'='||m);
end loop;
end;

select :myval  ||'*'|| rownum ||'='|| rownum*:A from dual connect by level <=:a

orclz>
orclz> var myval number
orclz> var A number
orclz> exec :myval:=5

PL/SQL procedure successfully completed.

orclz> exec :a:=2

PL/SQL procedure successfully completed.

orclz> select :myval  ||'*'|| rownum ||'='|| rownum*:A from dual connect by level <=:myval;

:MYVAL||'*'||ROWNUM||'='||ROWNUM*:A
--------------------------------------------------------------------------------------------------------------
5*1=2
5*2=4
5*3=6
5*4=8
5*5=10

orclz>

select :myval  ||'*'|| rownum ||'='|| rownum*:myval from dual connect by level <=:myval;

with aaa as ( select :x as x,:y as y  from dual) 
SELECT x||'*'||level || ' = ' ||round(exp(ln(x) + ln(level))) as output from aaa connect by level <= y;

select 
:1 as A,
level as B,
(:1*(level)) AS AintoB from dual connect by level <= (:2) ;

SELECT     :myval || '*' || ROWNUM || '=' || ROWNUM * :myval
      FROM DUAL
CONNECT BY LEVEL <= :myval;

SQL> SELECT     :myval || '*' || ROWNUM || '=' || ROWNUM * :myval
      FROM DUAL
CONNECT BY LEVEL <= :myval;  2    3  
SP2-0552: Bind variable "MYVAL" not declared.
SQL>