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Building a Basic Calculator

In this challenge you need to build a basic calculator that can perform actions like add, subtract, multiply and divide.The operation symbols are +, -, * and /.

Input Format
Each test case contains the first number, the symbol and the second number for the mathematical operation. All of them are separated by a blank space and all numbers are integers.

Output Format
For each test case output the operation result.

Sample Inputs
15 + 2
-4 / 2

Sample Outputs

Memory Limit

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