How do I do math operation for BigDecimal?

``````package org.kodejava.math;

import java.math.BigDecimal;
import java.math.RoundingMode;

public class BigDecimalOperation {
public static void main(String[] args) {
BigDecimal decimalA = new BigDecimal("98765432123456789");
BigDecimal decimalB = new BigDecimal("10");

System.out.println("decimalA = " + decimalA);

decimalA = decimalA.multiply(decimalB);
System.out.println("decimalA = " + decimalA);

decimalA = decimalA.subtract(decimalB);
System.out.println("decimalA = " + decimalA);

decimalA = decimalA.divide(decimalB, RoundingMode.DOWN);
System.out.println("decimalA = " + decimalA);

decimalA = decimalA.pow(2);
System.out.println("decimalA = " + decimalA);

decimalA = decimalA.negate();
System.out.println("decimalA = " + decimalA);
}
}
``````

Our code snippet results are:

``````decimalA = 98765432123456799
decimalA = 987654321234567990
decimalA = 987654321234567980
decimalA = 98765432123456798
decimalA = 9754610582533151990855052972412804
decimalA = -9754610582533151990855052972412804
``````