Answer:
Explanation:
If I'm reading your shorthand correctly you want this to be rounded to 3 digits.
There are two answers:
1) 8.27 * 10^2 which is the best way to show 3 significant digits or
2) 827 which works but is not as good as the scientific notation.
The reason is that you cannot be absolutely sure how many digits there are. It might just be a convenient way to show a number informally without worrying about significant figures.