Calculate the area of a circle whose radius is 5.
5
R²π = 25π ≈ 78.54. Therefore, the area of the circle is 78.54 square units.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Calculate the area of a circle whose radius is 5.

### Response:
R²π = 25π ≈ 78.54. Therefore, the area of the circle is 78.54 square units.