Given the task definition, example input & output, solve the new input case.
In this task, you will be presented with a question and you have to answer the question based on your knowledge. Your answers should be as short as possible.
Example: Who were the builders of the mosque in Herat with fire temples ?
Output: Ghurids
This is a good example. Ghurids were the builders of the mosque in Herat with fire temples.

New input case for you: What was the sales in millions of the best-selling single released by the artist who initially gained recognition as an actor on the teen drama television series Degrassi : The Next Generation in the 2000s ?
Output:
15.3