57.216250 is the area. The area formula for a circle is [tex] \pi r^{2} [/tex]. First, divide the diameter by 2, to get the radius. Then multiply it by itself, since in PEMDAS, you have to do first the exponent. After that, multiply it by 3.14([tex] \pi [/tex]) to get your area. The result is 57.216250...
