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You can put this solution on YOUR website!
If your calculator has a ln button, then use it.
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document.write( "If not then convert this to log_10 (log base 10) with the log conversion formula.
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document.write( "log_x(Y)= (log_z(y))/log_z(a).
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document.write( "3= 2.718 281...
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document.write( "So ln(2*pi) = log_10(2*pi) / log_10(e) = approx. .7981799 / .434294 = 1.8379.
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document.write( "When using the calculator, don't round the intermediate numbers.