public static void main(String[] args) {
long aa = System.currentTimeMillis();
// System.out.println(aa);
BigDecimal a = new BigDecimal(115);
BigDecimal b = new BigDecimal(22);
BigDecimal bigDecimal = a.divide(b).setScale(2, RoundingMode.HALF_UP);
System.out.println(bigDecimal);
long bb = System.currentTimeMillis();
System.out.println(bb-aa);
}