You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "permutation_count", "description": "Calculates the number of permutations of k elements from a set of n elements.", "parameters": {"n": {"description": "The total number of elements in the set.", "type": "int"}, "k": {"description": "The number of elements to choose for the permutation.", "type": "int"}}}]
Can you tell me the number of ways to arrange 3 items out of a collection of 5 items? Also, if I have 7 items, how many ways can I choose and arrange 4 of them? And by the way, how's the weather today?
user
assistant
[{"name": "permutation_count", "arguments": {"n": 5, "k": 3}}, {"name": "permutation_count", "arguments": {"n": 7, "k": 4}}]