maths!!!!!!!!help

100000xπ
=100000π
=100000(3.1415926535897932384626433832795028841971693993751058209749445923078164062862089)
=314159.26535897932384626433832795028841971693993751058209749445923078164062862089


or =100000[4(1/1-1/3+1/5-1/7+1/9-1/11+...+1/∞)]
=400000(1/1-1/3+1/5-1/7+1/9-1/11+...+1/∞)


or =100000 arccos-1


or =100000 ln-1/i


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