BUG #2774: Error select

The following bug has been logged online:

Bug reference: 2774
Logged by: Mas Kus
Email address: kusuma_ok@telkom.net
PostgreSQL version: 7.4.1-2
Operating system: Mandrake 10.0
Description: Error select
Details:

Hello...
I'm using Mandrake 10.0 full version as my OS. And use it for my web server.
I've installed the PostgreSQL to my server. The connection to the database
is good. I try to select by :

=>select 2147*1000000;
?column?
--------------
2147000000

But, when I tried select :

=>select 2148*1000000;
?column?
------------------
-214623000

Or When I try to multiply with the number than result more than 2147000000,
the result is minus or wrong.

Can you help me why ?

Thank you.
The result is "minus"....
What's wrong