[rules-users] performing math function in drools

Hi, I need to know how can we perform math operations in drools. For eg: I have a rule which calculates tax and I have a function in which I have to perform power operation i.e. (1+r)^n Best Regards, Kripa ________________________________ This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system. ______________________________________________________________________