Designed by Blaise Pascal in 1642 (at age 19!), the Pascaline was the world’s first mechanical calculator—it could add, subtract, multiply, or even divide digits.In 1843, Ada Lovelace remarked on the invention of the Analytical Engine, ...
He was also an inventor and invented the world’s first working calculator, which could add, subtract, multiply and divide numbers of up to eight digits. He presided over the manufacture of these things, they’re called Pascaline, and there are still several examples that exist now and work...