Y 1 8 0 7 5 8 July 8, 2019 16 32 64 128 34 8 y 0 8 1 5 7 8 Y/8=1 5/0 4 (y-1 8) 0 7=5 8 (y-1 8) 0 7 (y-1 8)รท8=0 7