hav no idea wot "rs" mite be
This is faemus old saeing atributed tu India.
It sho how fast exponenshal kan gro
in klasikal story, king offer tu giv man 1 graen av weet on dae 1
2 graens on dae 2, 4 on dae 3, 16 on dae 4, til fill up chess bord (64 squares)
last dae him get 2^64 graens
& the sum av all prior daes=2^64 -1, so in effekt, him get 2*(2^64) graens
2^64=18, 446, 744, 073, 709, 551, 616