What is the area of a circle that has a radius of 3 miles?

Area of a circle formula: pi*radius^2 (pi multipled by (radius squared))

Pi is a number with an infinite number of decimal places, it is on most good calculators (the symbol looks a bit like a bridge, or something from Stone Henge). If you can't find the function for pi on your calculator, use the approximation pi=3.14159.

So, Area=3.14159 multiplied by 3^2.