__Pascaline:__

Pascaline was invented by Blaise Pascal in 1642 AD.

IT consists of some cogs and gears rotating in complement to each other.

Its purpose for multiplication, division, addition, subtraction.

Its main features are as follows:

The Pascaline is a direct adding

Machine.

The machine has to be re-zeroed before each new operation.

it can do calculations of more than

8 digits.

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