加减乘除

import java.math.BigDecimal;
import java.math.BigInteger;

public class Demo03 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        BigInteger b1=new BigInteger("150000000000000000000000000000000000");
        BigInteger b2=new BigInteger("150000000000000000000000000000000000");
        System.out.println(b1.add(b2));//加法
        System.out.println(b1.subtract(b2));//减法
        System.out.println(b1.multiply(b2));//乘法
        System.out.println(b1.divide(b2));//除法
    }

}