P6467 [COCI 2008/2009 #6] BUKA

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.

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

#### Explanation **This problem is translated from [COCI2008-2009](https://hsin.hr/coci/archive/2008_2009/) [CONTEST #6](https://hsin.hr/coci/archive/2008_2009/contest6_tasks.pdf) *T1 BUKA***。 Translated by ChatGPT 5