PROGRAMMING:Test computer

Take the computer test. It's up to you. The format of the title is as follows: a + B four arithmetic questions, let the computer output the results.
###Input format:
In the form of a + B, a and B are integers with one of the symbols +, -, *, / in the middle. There is no space in the middle of the formula.
###Output format:
An integer.
###Input example:
```in
1+2
```
###Output example:
```out
three
```
###Input example:
```in
1-2
```
###Output example:
```out
-1
```
###Input example:
```in
3*5
```
###Output example:
```out
fifteen
```
###Input example:
```in
13/5
```
###Output example:
```out
two
```







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