Centuries ago, a now-lost library brought Arabic numerals to the world: "How modern mathematics emerged from a lost Islamic library" See also @richove
(Plus- John Pell and the obelus)

Count your blessings: https://roughlydaily.com/2020/12/12/those-who-wish-to-know-the-art-of-calculating-its-subtleties-and-ingenuities-must-know-computing-with-hand-figures/