Can you help me understand this question and write it out? "32 cases of a disease are found over an area of 100 square miles. If the cases are distributed at random within the area, what is the...

Can you help me understand this question and write it out?

"32 cases of a disease are found over an area of 100 square miles. If the cases are distributed at random within the area, what is the probability of finding four cases within an 8 square mile area around a local power plant."