private Object scaleInput(Object obj) {
            if (divider != null) {
                if (obj instanceof BigDecimal) {
                    obj = ((BigDecimal)obj).divide(divider, RoundingMode.HALF_UP);
                } else if (obj instanceof Double) {
                    obj = (Double)obj / divider.doubleValue();
                } else {
                    throw new UnsupportedOperationException();
                }
            }
            return obj;
        }
Creates a formatter using the given locale.
fastexcel-core/src/main/java/cn/idev/excel/metadata/format/DataFormatter.java