# How do I do math operation for BigInteger?

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

import java.math.BigInteger;

public class BigIntegerOperation {
public static void main(String[] args) {
BigInteger numberA = new BigInteger("98765432123456789");
BigInteger numberB = BigInteger.TEN;

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

numberA = numberA.multiply(numberB);
System.out.println("numberA = " + numberA);

numberA = numberA.subtract(numberB);
System.out.println("numberA = " + numberA);

numberA = numberA.divide(numberB);
System.out.println("numberA = " + numberA);

numberA = numberA.mod(numberB);
System.out.println("numberA = " + numberA);

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

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

Our class result are:

``````numberA = 98765432123456799
numberA = 987654321234567990
numberA = 987654321234567980
numberA = 98765432123456798
numberA = 8
numberA = 64
numberA = -64
``````

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