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I will try to make this clear direct me if it is not.

In simple scientific solution, the equation contain individual numerical clusters separated by the math functions that will look like e.g. 1234.5 e^3 of defined digits that is 7 digits defining the value. Such as 1,234,500

If a particular constant value is introduced that has the fractional portion, which can extend infinitely longer then 7 digits; e.g. Pi or the square root of 2 or the reciprocal of the sin 45 deg

1.4142135623730950488016887242097

At which of these digits after the decimal point should the correct rounding out respectfully be 5th, 6th or 7th digit long?

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