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Thread: Mechanical calculator trying to divide by zero

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    Jon
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    Mechanical calculator trying to divide by zero

    Mechanical calculator tries to divide by zero, in GIF and short video.


    https://s3-us-west-1.amazonaws.com/h...ng_by_zero.gif

    We don't know exactly why this is happening with this specific Facit ESA-01 mechanical calculator, but it might have to do with how some mechanical calculators use subtraction to perform division. Like this:

    20 4 = ?

    1. 20 - 4 = 16
    2. 16 - 4 = 12
    3. 12 - 4 = 8
    4. 8 - 4 = 4
    5. 4 - 4 = 0

    5 steps are used to get to zero above. Thus, 20 4 = 5. So here's the problem when using subtraction when dividing by 0:

    20 0 = ?

    1. 20 - 0 = 20
    2. 20 - 0 = 20
    3. 20 - 0 = 20
    4. 20 - 0 = 20
    5. 20 - 0 = 20
    6. 20 - 0 = 20
    7. 20 - 0 = 20

    etc...




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