Hello!
A circular pan is the same as a circle
To find the area of a circle you use the equation
[tex] \pi r^{2} [/tex]
r is radius which is half the diameter
put in 3.14 for pi and the radius
3.14 * [tex]4^{2} [/tex]
square the 4
3.14 * 16
Multiply
The answer is 50.24
Hope this helps!