Hehe...I can confuse you even worse. Here in America, a football field is 160 22.5" step long. Those are 8 to 5 steps (8 steps for every 5 yards, and you'd better hit that yardline squarely in the middle [arch] of your right foot!).
Pick up the tempo a little bit, and it's only 120 30" (6 to 5) steps long.
(Note, those are goal line to goal line to goal line figures, obviously. We never march in the end zones, unless we're coming on or off the field. There aren't any lines there to march by).