7 1 4 x 10 1 2 July 8, 2019 16 32 64 128 7 1 4 x 10 1 2 paper 7 1 4 x 10 1 2 paper size 1 1 7 x 10 1 2 x 6 3 4 (- 1 5 2 ) ( x 7 10 )=- 1 4 7 x 3 1 4 x 10 1 2 Solve 1 4 7 10 1 x 287 7 x 10 7 1/2 x 4 7 1/2 x 4 1/2 4/7 x 10 7 x 10 1/2
