4 1 6 x 8 9 July 8, 2019 16 32 64 128 1 2 3 4 x 6 7 8 9 6 1 8 x 9 1 4 paper 4 x 1 2 6 x 8 5 x − 9 4 9x 1 )+ 5 3x 7 )- 6 x 8 1 8 12 4 x 6 9 8 1/4 x 6 4 1/8 x 9 1/2