In math, it is spelled "pi". It is an irrational number. The first few decimal places are 3.1415. a more accurate number is 7/22.
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To 4 decimal places, the number is 3.1416 not as given above. And, the rational approximation is 22/7 not 7/22.
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well, Albert Einstein created it and it is called pie because a pie is always used in fractional math
its pi and its 3.14
In a circle
3.14159 or 22/7
Pie