Using 285.60 x 22/7 gives 897.60 feet and this is 272 megalithic metres or 330 megalithic yards.
So well known, if somewhat disputed, ancient measurements.
I suggested in my last book 'SH the eclipse' that the Aubrey circle defines 2912 days.
On this site I have come across the ancient Babylonian version of pi as 3.125.
This is on top of the discovery of Thom pi as 5440/1733.333r and imperial I as 5280/1680.
If the imperial foot represented 100 units in ancient times then 897.6 becomes 89760.
89760 / 5280 x 1680 = 28560
28560 / 5440 x 1733.333r = 9100
9100 / 100 x 32 = 2912.
100/32 is 3.125
Thom said they had to have everything in whole numbers.
This is Pi cubed and unbelievably Egyptian pi divides into 2912 making the calculation pi to the power 4 being used at SH Aubrey.