PROGRAMMING:Simple arithmetic expression evaluation

###Task description
```
Simple arithmetic operation of two positive integers (only integer operation is considered). The arithmetic operation is as follows:
+, addition operation;
-Subtraction operation;
*, multiplication operation;
/, integer division operation;
%, remainder operation.
The format of an arithmetic expression is (there may be spaces before and after an operator): an operatoran operatoran
Please output the corresponding result.
```
###Input format:
```
One line of arithmetic expression.
```
###Output format:
```
The result of integer arithmetic operation (the result value may not be 2 digits, more than 2 digits or less than 2 digits).
```
###Input example:
```in
32+64
```
###Output example:
```out
ninety-six
```
###Input example:
```in
64 / 32
```
###Output example:
```out
two
```
###Title Source
Note: this topic is selected from openjudge website http://noi.openjudge.cn/ch0112/01/







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