rank=2 dims=(8,8) chunks=(3,3)
[0/0][0/0] = 00 01 02
             08 09 10
             16 17 18
[0/0][1/3] = 03 04 05
             11 12 13
             19 20 21
[0/0][2/6] = 06 07 _
             14 15 _
             22 23 _
[1/3][0/0] = 24 25 26
             32 33 34
             40 41 42
[1/3][1/3] = 27 28 29
             35 36 37
             43 44 45
[1/3][2/6] = 30 31 _
             38 39 _
             46 47 _
[2/6][0/0] = 48 49 50
             56 57 58
             _ _ _
[2/6][1/3] = 51 52 53
             59 60 61
             _ _ _
[2/6][2/6] = 54 55 _
             62 63 _
             _ _ _