It is not possible to answer the question since the unit for 4428.674 is not stated.
10 square chains = one acre
0.09 acre = 0.9 square chains
40 acres is 400 square chains.
Their are 10 Square chains in an acre see http://www.answers.com/topic/chain-unit for more details
1 square chain equates to 484 square yards.
Each side of a square with an area of 10 acres measures: 10 chains in length.
press square
Background: 1 chain = 22 yards (approximately 20 metres) or 66 feet. There are 80 chains in a mile. Answer: 1 square chain = 22x22 or 484 square yards = 66 x 66 or 4356 square feet. Interestingly 1 acre = 10 square chains (yes, 10). So 1 square chain = 0.1 acres.
One acre equals 10 square chains.
There were several versions of measuring chains in history, but the most popular for the last 400 years was the Gunter's chain, measuring 66 feet, having 100 links. The 66-foot measurement has the interesting characteristic that it is the square root of 4356, which is 1/10 of the number of square feet in an acre. Thus, ten square chains is on acre. Obviously, a mile is also composed of 80 chains (5280/66). Many land surveys into the 20th century continued to use chains in the USA, as well as rods, which is exactly 1/4 of a chain.
A rod comes from medieval England. Also called a pole or a perch, it is 5.5 yards long. Four rods make a chain. Ten chains make a furlong and eight furlongs make a mile. Ten square chains, or 160 square rods make an acre.
An acre's breadth is a historical term for a chain - the width of a single acre, which is defined as 10 square chains.