You have a syntax error on or near line 6 of your program, just like the error message says. That means that perl doesn't understand you.

You should probably fix it.

If you'd like help in fixing it, you should probably post the first dozen lines of your program or so, because we can only guess what the problem is without seeing the code.

Another thing that will help make your code, or output, more readable is if you wrap it in "code" tags, like this:

<code>

Number found where operator expected at activity.pl line 6, ...

Number found where operator expected at activity.pl line 8, ...

</code>

which will make it look like this:

Number found where operator expected at activity.pl line 6, ...
Number found where operator expected at activity.pl line 8, ...
[download]

You can also use <c> and </c> as shorthand for the code tags.

And don't worry, I had to be instructed about codetags a couple of times until I understood it correctly, when I first joined Perlmonks :-)

You might also consider the use of code tags:
<code> ...

</code>

Update: As you can see, the helpfulness of monks here is exceeded only by their speediness ... if you want to answer a question, you'd better be fast, or you'll be scooped by someone a little quicker on the uptake. :)

Looks to me like you are trying to use C style comments. /* ...*/. This is not the right syntax in Perl, in Perl you denote comments by #. Anything after a # till the end of the line is ignored ... unless of course the # is inside a string or some other construct, similar to // in C.

There is no counterpart of /*...*/ in Perl.