We then treat this quantity as the principal of an account and compound the interest monthly over a period of 12 months. This results in a final amount with a difference over 0.01. Decimal Principal: ...

In short, I want to go from a decimal, for example, 7, that is represented by 7000000000 * 10^(-9) (=decimal.New(7000000000, -9)) to 7 * 10^0 (=decimal.New(7, 0)) - these two representations are equal ...