Blaise Pascal, a child prodigy who has…

Blaise Pascal, a child prodigy who has been educated by his father, a tax collector in Rouen, is still a teenager in 1642 when he starts some pioneering work on calculating machines and after three years of effort and fifty prototypes, he invents the mechanical calculator, a toothed wheel device.

He will in the following ten years build twenty of these machines (called the Pascaline).