Some landscaping companies use π = 3.14, and twenty digits seems to be overkill for most scientific applications. Might still be worth a remark in A796... Al -- Alonso del Arte Author at SmashWords.com <https://www.smashwords.com/profile/view/AlonsoDelarte> Musician at ReverbNation.com <http://www.reverbnation.com/alonsodelarte>