User:Jccsvq/Abacus diagrams and procedure tables

Using images
Diagrams of this type:

may be tailored in this way

or you can use this rudimentary AWK code: to automatically generate them from an input like: 9 18 9 0 0 1 0 0 0 0 9 9 9

txt-abacus
Generated with https://github.com/jccsvq/txt-abacus. Work on my desktop but not on my mobile devices because of accessible fonts. It is better to forget them for now!

9 18 8  0  0  1              9  9  9 ╔═════════════════════════════════════════╗ ║  │  │  │  ●  ●  ●  ●  ●  ●  ●  │  │  │  ║ ║  │  │  │  │  │  │  │  │  │  │  │  │  │  ║ ║  ●  ●  ●  │  │  │  │  │  │  │  ●  ●  ●  ║ ╠═════════════════════════════════════════╣ ║  ●  ●  ●  │  │  ●  │  │  │  │  ●  ●  ●  ║ ║  ●  ●  ●  │  │  │  │  │  │  │  ●  ●  ●  ║ ║  ●  ●  ●  ●  ●  │  ●  ●  ●  ●  ●  ●  ●  ║ ║  ●  │  │  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ║ ║  │  │  │  ●  ●  ●  ●  ●  ●  ●  │  │  │  ║ ║  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  │  │  │  ║ ║  │  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ●  ║ ╚═════════════════════════════════════════╝    A  B  C  D  E  F  G  H  I  J  K  L  M

Example data
ABCDEFGHIJKLM| 4567890123|Entering radicand starting in CD (first group) 2          |First root digit in B   -4         |Subtract square of B from first group 2 567890123|Null remainder 4 567890123|Doubling B. Appending next group to remainder 41 567890123|5/4≈1, try 1 as next root digit -4       |Continue division by 41, subtract 1✕41 from EF     -1| 41 157890123|15 as remainder 42 157890123|Double second root digit 42 157890123|Append next group 423157890123|157/42≈3, try 3 as next root digit -12      |Continue division by 423, subtract 3✕423 from E-H -06|     -09|  423 30990123|309 as remainder 426 30990123|Double third root digit 426 30990123|Append next group etc.|

Generated table
After changing caption: