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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal">I need to know how can we perform math operations in drools.<o:p></o:p></p>
<p class="MsoNormal">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<o:p></o:p></p>
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<p class="MsoNormal" style="text-autospace:none"><span style="font-size:14.0pt;
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