protected MoneyAmount divide(MoneyAmount that) {
Unit<?> unit = unit().divide(that.unit());
return MoneyAmount.of(((BigDecimal) getNumber()).divide((BigDecimal) that.getNumber()), unit);
}
protected MoneyAmount times(MoneyAmount that) {
Unit<?> unit = unit().multiply(that.unit());
return MoneyAmount.of(((BigDecimal) getNumber()).multiply((BigDecimal) that.getNumber()), unit);
}