Answer:
The data is transformed to usually make it smaller. It can always be re-constructed back to the original.
Explanation:
I'm on the same lesson on code.org as you, so just go to the question before and the answer to that question was the answer! ;)
Let me know if you got it right!
The answer for your problem is "super computer" These types of computers can processes 1 million or more digit numbers in one second.