Pythagorean table with two guides to multiply from 1x1 to 10x12, if you have a machine with two filaments you can do the last layers in another color, if you have to do a lot on a single filament machine I recommend doing it in a light color and painting the letters with an indelible black fibron, no supports necessary. The guides are forcibly fitted, the shortest one first. I recommend making the guides in a different color to achieve contrast.

added a 12 x 12 board, use the two long guide.

Creality

Ender 3 Pro

No

No

0.25

15%

print in 3 perimeters to give it good hardness, 3 layers above and three layers below, 15% infill, I did it at a layer height of 0.25 with a 0.4 nozzle, the same settings for the table and for the guides.