3 x 1 2 12 0 July 8, 2019 16 32 64 128 X 2 3 6 x 1 2 x 3 12 0 0 5x 2 3 x 1 )=- 1 12 X 2 3 7x 1 3 12 0 0 3 x 12 mm 30g 1 2 X 4 3 x 2 12 x 1 4 0 1 + 12 + 2 + 3 3 x-1 12 3 x 0