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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def multiple(layer: int, limit: int) -> Set[str]: 	"""Returns a set of strings to be used as Slots with Pabianas default Clock. 	Args: 		layer: The layer in the hierarchy this Area is placed in. 			Technically, the number specifies how many of the Clocks signals are relevant to the Area. 			Between 1 and limit. 		limit: The number of layers of the hierarchy. 	"""

	return {str(x).zfill(2) for x in [2**x for x in range(limit)] if x % 2**(layer - 1) == 0}