EXPR ERROR-- is it a bug please reply me soon

"seshadri" <[email protected]> Sat, 8 Jun 2002 17:39:54 +0530

Newsgroups	gmane.comp.gnu.sh-utils.bugs
Message-ID	<000801c20ee5$b47d37c0$51f0c7cb@sesha>

Dear sir/madam,

                        Iam a college student studying my 2nd year B.E. iam currently undergoing my course on LINUX SHELL SCRIPTING i found that while executing one of my scripts that EXPR gave this output

$ expr 479001600  \*  13
1932053504
$

but the above is not the answer it should be 6227020800 

why it shows the above answer?
i need your reply immeadiately.

Please answer me quickly .
thanking you,