One yard is 3 feet. In one foot is 12 inches. I would translate it all into inches before beginning. 3 yards, 1 foot, 8 inches equal 128 inches. 1 yard, 2 feet, 3 inches equal 53 inches. Since you are finding the amount of fencing (perimeter) you would add 128+128+53+53 which equals 362 inches of fencing. I hope this helps.