powering to decimal number produce wrong answer : my calculation is simple but it provide wrong answer,
for example 3**0.1-0.3 should equal to 0.0,
but python interpreter give 0.8161
even on using Decimal system,i am using python 3.6.3,
here my code is
  
    from decimal import Decimal as D
    print(D('3')**D('0.1')-D('0.3'))

here is output
    
    0.816123174033904434442614138


