private WholeNumberPart(DigitSequence digitSequence)
: base(digitSequence)
{
_value = digitSequence.Value;
}
private FractionalPart(FullStop fullStop, DigitSequence digitSequence)
: base(fullStop, digitSequence)
{
var divisor = Math.Pow(10, digitSequence.DigitCount);
_value = digitSequence.Value/divisor;
}