140 is 140. If you're looking for something else, please provide more information/context/clarification to help us answer this question. You can post your response in this answer text by clicking "Edit."
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An approximation error is the discrepancy between an exact value and the approximation to it. This occurs when the measurement of something is not precise.
Approximation
3.16227766 which is about 3.2
I'd say 2.1 or 2.
It looks like the decimal value of Pi - however, some of the digits are wrong... 3.14159265358979