You have a multiply number (e,g, 100), which multiplies the reputation points of all users. This multiplication is visible in all places where the user's reputation score is shown.
It is useful when your service is quite small at the beginning, and you want reputation points to look better (bigger numbers) - then you set this option.
If you don't want point scores to be multiplied, you set the value to 1 .
What is more, you can change multiply value even if your website is already running and have users. In that case, their points will be recalculated.