Ramón Verea
Ramón Silvestre Verea Aguiar y García (Curantes, 11 December 1833 – Buenos Aires, 6 February 1899) was a Spanish journalist, engineer and writer, known as the inventor of a calculator with an internal multiplication table.
...
Wikipedia
Ramón Silvestre Verea Aguiar y García (Curantes, 11 December 1833 – Buenos Aires, 6 February 1899) was a Spanish journalist, engineer and writer, known as the inventor of a calculator with an internal multiplication table.