Simple calculator

Can you write a simple calculator?
The input contains 1 integer, an operation +-*/, and another integer. The output should contain the result of the expression. If the operation is not one of the +-*/, the program should print Unsupported operation. If the program encounters division by 0, it should print Cannot divide by 0.
2 * 2
2 / 0
Cannot divide by 0


Time limit: 2 seconds

Memory limit: 512 MB

Output limit: 1 MB

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