The Calcatraz API allows you to access calculations in a format which can be easily used within your own programs.
To get the answer to a calculation, simply request a URL like this:
http://www.calcatraz.com/calculator/api?c=3%2A3
where the 'c' parameter is the urlencoded form of your calculation.
This allows you to perform calculations from within your own programs very easily. For instance in PHP do:
echo '3*3='.calculate('3*3'); // display the answer
function calculate($calc) {
return @file_get_contents(
'http://www.calcatraz.com/calculator/api?c='.urlencode($calc));
}