This is what I get: 1.33
Is it correct?
an acre of land (in square feet) is 43560sf
3/4 of an acre is 32670sf
for 22 eq sized plots 32670/22 = 1485sf
however didn't mention if you need a forumla to
give the width and lenght of one of the plots to fit the dimensions of the garden which would be needed to lay it out.