Description

Given two integers with at most $100$ digits, and both are powers of $10$, you need to compute the result of either their multiplication or their addition.

Input Format

The input consists of three lines.

The first and third lines each contain an integer, representing the numbers to be computed. The second line contains one character, either * (multiply) or + (add), indicating which operation to perform. The testdata is generated under Windows, so please note the \r contained in the line ending.

Output Format

Output one line containing one integer, which is the result of the operation.

1000
*
100

100000

10000
+
10

10010

10
+
1000

1010

1
*
1000

1000

Hint

Explanation

This problem is translated from COCI2008-2009 CONTEST #6 T1 BUKA。

Translated by ChatGPT 5