The conversation between human and AI assistant.
How many numbers between 100 and 500 are divisible by 3 or 7?
That's really interesting. How else can we apply the inclusion-exclusion principle?
The principle can be used in a variety of contexts, such as calculating probabilities of events in probability theory, or counting the number of permutations with certain properties in combinatorics. It's a powerful tool for dealing with complex counting problems.