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BigDecimal a = new BigDecimal(10);

BigDecimal re = a.divide(new BigDecimal(3));

System.out.println(re);

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BigDecimal a = new BigDecimal(10);

BigDecimal re = a.divide(new BigDecimal(3)).setScale(2, BigDecimal.ROUND_HALF_UP);

System.out.println(re);

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BigDecimal a = new BigDecimal(10);

BigDecimal re = a.divide(new BigDecimal(3),2,BigDecimal.ROUND_HALF_UP);

System.out.println(re);

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try {

    quotient = this.divide(divisor, mc);

} catch (ArithmeticException e) {

    throw new ArithmeticException("Non-terminating decimal expansion; " +

                                  "no exact representable decimal result.");