Related Post: 13 12 2 X 3 13 2x 12 X 32 13 2 3 X 12 1 6 13 12 * 3x If X 2 X 2 13 12 3x 3 13 X 2 12 X 1 11 4 13 X 3 12 X 2 11 3x 8 12 X 2 )- 13 13 12 X 3 2 4 6 13/2 = /12