Provide sample input data to the following program
Create a function to calculate the area of a circle, given the radius
Input: Radius = 4
Answer: Area = 50.26548245743669
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Provide sample input data to the following program

### Response:
Input: Radius = 4
Answer: Area = 50.26548245743669