백준 2935 소음

B_2935.java

import java.math.BigInteger;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger n = new BigInteger(sc.nextLine());
        char c = sc.nextLine().charAt(0);
        BigInteger m = new BigInteger(sc.nextLine());
	
        if(c == '*')
            System.out.println(n.multiply(m));
        else 
            System.out.println(n.add(m));
    }
}