Question

name any one manual calculating device

Answer 1

The mannul calculating device is Calculator.

Hope it helps you !
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Thank you !
Have a wonderful day ?

Answer 2

There are many manual calculating machines,

The best example is Our Brain,

What do you think , How our Brain works? It is operated manually , If we want calculation then we use it, Can't it be considered manual ? Ofcourse Yes ! It is Indeed,

Calculator is also manual in Inputting the data, But it calculates automatically,

Hope you understand,

Have a great day !!