Force calculation result as decimal

[scidam]

To avoid errors of floating point object representation in memory, it is better to pass strings to Decimal class, e.g.
python -c "from decimal import Decimal; print(Decimal('0.0000006') + Decimal('0.0000008'))". This likely should work in python2.6.
@vercetty92, why did you are still using Python 2.6? Constructor of Decimal class in current versions of Python, e.g. Python 3.7, could process floats directly (without errors as in your example).