10 2 3 x 8 1 4 July 8, 2019 16 32 64 128 1 2 x 3 8 x 10 45 3 4 x 8 1 2 2x 10 10 − 2 x 3 1 4 6x 4 8 2 Range hood filter 10 1 2 x 8 3 4 X 1 10 x 2 9 x 3 8 x 4 7 1 + 2 + 3 + 4 = 10 10 3/4 x 8 1/4 10 /8 ×2