To find the area of a circle using the formula:

$A = \pi r^2$

where $r$ is the radius, follow these steps:

1. First, square the radius $r$. For a circle with radius $r = 7$: $r^2 = 7^2 = 49$

2. Then, multiply by $\pi$: $A = \pi \times 49$

So, the exact area is $49\pi$.

To approximate the area using $\pi \approx 3.1416$:

$A \approx 49 \times 3.1416 = 153.9384$

Thus, the approximate area of the circle is $153.94$ square units.

Would you like to go over any part in more detail?

Here are 5 related questions for further practice:

1. What is the area of a circle with a radius of 10?
2. How would the area change if the radius was doubled?
3. What happens to the area if the radius is halved?
4. If the area of a circle is $78.5$, what is the radius?
5. Can you find the circumference of a circle with a radius of 7?

Tip: Always remember to square the radius first before multiplying by $\pi$ when finding the area of a circle.