To calculate the area of a circle with radius (r = 5), we use the formula for the area of a circle:

Step 1: Recall the formula

The area (A) of a circle is given by:
[A = \pi r^2]

Step 2: Substitute the radius (r = 5)

[A = \pi \times 5^2 = 25\pi]

Step 3: Approximate using (\pi \approx 3.14)

[A \approx 25 \times 3.14 = 78.5]

Answer: The area of the circle is approximately (\boxed{78.5}) (or (25\pi) if leaving it in exact form).

(\boxed{78.5})

作者声明:本文包含人工智能生成内容。