Use mod rewrite to change a url like that: /index.php?option=com_content&task=view&id=1&Itemid=27 to that: 03295.html

I have installed joomla, and enabled the Search Engine Friendly Urls

this is done by enabling mod rewrite with this code at .htaccess:


########## Begin - Joomla! core SEF Section
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} (/|\.htm|\.php|\.html|/[^.]*)$  [NC]
RewriteRule ^(content/|component/) index.php


########## Begin - Rewrite rules to block out some common exploits

# Block out any script trying to set a mosConfig value through the URL
RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR]
# Block out any script trying to base64_encode crap to send via URL
RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [OR]
# Block out any script that includes a <script> tag in URL
RewriteCond %{QUERY_STRING} (\<|%3C).*script.*(\>|%3E) [NC,OR]
# Block out any script trying to set a PHP GLOBALS variable via URL
RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
# Block out any script trying to modify a _REQUEST variable via URL
RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2})
# Send all blocked request to homepage with 403 Forbidden error!
RewriteRule ^(.*)$ index.php [F,L]

What this does it that it transforms a url that looks like this: http://mydomain.tld/index.php?option=com_content&task=view&id=1&Itemid=27
into this:
http://domain.tld/content/view/1/27/

My question is, how can I change the regular expressions so the output will be something like this: http://domain.tld/content/view/1/27/34534.html    meaning to have a random number with .html extention..is that possible?