프로그램 명: coci_buka
제한시간: 1 초

[문제요약] a + b 또는 a * b 를 구하는 문제이다. 

- 첫 줄에는 a 가, 
- 두 번째 줄에는 '+' 혹은 '*' 가 
- 세 번째 줄에는 b 가 주어진다.
a, b 는 10 의 거듭제곱이며 각 숫자는 100 자리를 넘지 않는다.
Quite often there is substantial noise in the classroom during class. Instead of paying attention to what the teacher is saying, the students rather discuss the economic crisis or Croatia's joining the European Union.

The biggest noise often occurs when the students are idle, so teachers will give them tasks with a lot of work to calm them down. In one type of such task, the student must calculate the result of an arithmetic operation on two large numbers. The arithmetic operations we will consider are adding and multiplication. The operands will be powers of 10 with no more than 100 digits.

Write a program that calculates the result of the operation.

입력

The integers A and B will be powers of 10 and consist of at most 100 digits.

출력

Output the result of the operation.

입출력 예

입력 

1000 
* 
100 

출력 

100000 

입력 

10000 
+ 
10 

출력 

10010 

입력 

10 
+ 
1000 

출력 

1010 

입력 

1 
* 
1000 

출력 

1000

출처: coci 2008/2009 contest6 1/6
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