3 14x9 2 July 8, 2019 16 32 64 128 3 14 x 9 2 2x 14 3 x 9 14 22 x 3 9 22 3 x 14 9 mm 9 25 x 3 14 3 14×9 3 14 x 9 3 9/14x-2 17/21x=1 1/9
