@@ -0,0 +1,394 @@
+import java.io.*;%0Aimport java.util.*;%0Aimport java.text.*;%0Aimport java.math.*;%0Aimport java.util.regex.*;%0A%0Apublic class Solution %7B%0A  public static void main(String%5B%5D args) %7B%0A    Scanner sc = new Scanner(System.in);%0A%0A    BigInteger a = new BigInteger(sc.next(), 10);%0A    BigInteger b = new BigInteger(sc.next(), 10);%0A%0A    System.out.println(a.add(b));%0A    System.out.println(a.multiply(b));%0A  %7D%0A%7D%0A

solve biginteger