Even with few iterations, we can get very close to pi!
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表达式8: "e" Subscript, "r" "r" , Baseline left parenthesis, "x" , right parenthesis equals 1 minus StartAbsoluteValue, StartFraction, "f" left parenthesis, "x" , right parenthesis Over "g" left parenthesis, "x" , right parenthesis , EndFraction , EndAbsoluteValueerrx=1−fxgx
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表达式9: "a" equals 100a=100
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表达式10: "f" left parenthesis, "a" , right parenthesisfa
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表达式11: "e" Subscript, "r" "r" , Baseline left parenthesis, "a" , right parenthesiserra
