1 7 10 x 2 1 4 July 8, 2019 16 32 64 128 1 1 7 x 10 1 2 x 6 3 4 (- 1 5 2 ) ( x 7 10 )=- 1 4 3 7 10 x 2 1 4 7 1 4 x 10 1 2 paper 7 1 4 x 10 1 2 paper size 10 1/2 x 7
