<Li> A virgate was the amount of land tillable by two oxen in a ploughing season . </Li> <Li> A carucate was the amount of land tillable by a team of eight oxen in a ploughing season . This was equal to 8 oxgangs or 4 virgates . </Li> <P> A furlong is a measure of distance in imperial units and U.S. customary units equal to one - eighth of a mile, equivalent to 660 feet, 220 yards, 40 rods, or 10 chains . </P> <P> Using the international definition of the inch as exactly 25.4 millimetres, one furlong is 201.168 metres . However, the United States does not uniformly use this conversion ratio . Older ratios are in use for surveying purposes in some states, leading to variations in the length of the furlong of about two parts per million, or 0.4 millimetres (⁄ inch). This variation is too small to have many practical consequences . Five furlongs are about 1.0 kilometre (1.00584 km is the exact value, according to the international conversion). </P>

Eight furlongs are equal to what standard length