//Exercise 7.7
import java.math.BigInteger;
public class TestBigInteger {
	public static void main(String[] args){
		BigInteger i1 = new BigInteger("111111111111111111111111111111111111111111");
		BigInteger i2 = new BigInteger("2222222222222222222222222222222222222222222");
		System.out.println(i1.add(i2));
		System.out.println(i1.multiply(i2));
	}
}