Hi! :)
So the formula to find the area of a circle is A=[tex] \pi [/tex][tex] r^{2} [/tex]. The r stands for radius, so just a little simple math should give us your answer.
Following the rules of PEMDAS, you need to deal with exponents first. So [tex] 13^{2} [/tex]=169. Then multiply [tex] \pi [/tex] by 169 and we should have our answer.
3.14*169=530.66
So your answer should be approximately 530.
Hope this helps!