Create a function that transforms a string of upvote counts into a list of numbers. Each k represents a thousand.
transform_upvotes("6.8k 13.5k") ➞ [6800, 13500]
transform_upvotes("5.5k 8.9k 32") ➞ [5500, 8900, 32]
transform_upvotes("20.3k 3.8k 7.7k 992") ➞ [20300, 3800, 7700, 992]
Return the upvotes as a list.