Solution: From the meaning of the question, we know that this question is a geometric probability. All the events included in the experiment are ω = {(x, y) | 8 < x < 9, 8 < y < 9}, the area represented by the corresponding event set is s= 1, and the events that meet the conditions are A={(x, y) | 8 < The area represented by the set corresponding to the event (shaded part in the figure) is1-12×12-12× 23 = 4772. According to the geometric probability formula, P=4772 is obtained, so the answer is: 4772.