4 3 x 9 20 1 4 July 8, 2019 16 32 64 128 1 3 4 x 9 1 4 x 20 lvl beam 5 x 3 x 9 4 1 ) 20 4 x 2 (3 3 − 4 9) 20 4 + 4 = 3 4 x 9 + 3
