So I was reading an Isekai book where the everyone has stats like they would in a game. The protagonist cheat power is that they can syphon off a portion of other people's stats by touching them, with the added benefit that the people who get siphoned grow their stats quickly to have a higher number based on the amount what was taken.

Some of her friends found out and asked her to siphon off one of their stats as often as possible so one day they could be really awesome.
After reading that, I began to wonder how long it would actually take them to get there.

So she can syphon one person every 6 days, she siphons 5% of their current total, and their total increases by that 5%.

What equation do i use to figure this out?