On Fri, 2 Dec 2005, Olin Lathrop wrote:

>> Accurate to better than 1 part in 10^7.
>
> Or just punch the PI button on the calculator.  I'm not going to do 355/113
> without a calculator, and if I've got one I don't need 355/113.

Imho 22/7 is easy to remember and can be calculated in the head. The 
result is within better than 1/2 thousandth of PI. More accurate than 
any lanscaping, carpentry, or metal cutting you are ever likely going to 
do without something computer assisted.

Peter
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