Pi is 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628…(forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever, forever…) By the way, pi is used as pi*radius squared for areas of circles, or 2*pi*r (pi*diameter)for circumference
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