Regular expression: move comma to the right (or "multiply by 10"), is that possible?

Question

Regular Expressions

In general, there was such a need in Sublime Text: to replace one with another with a regular expression (because manually I got completely confused).
You need to multiply the numbers by 10 or just move the comma (point) to the right.
.1rem => 1rem
10rem => 100rem
1.2rem => 12rem
1.28rem => 12.8rem
And no matter what I do, nothing happens normally.
Stuck on "1.28rem", because ... after the dot there can be any number of digits, right?
How would you implement this ?

Answer 1

As soon as I asked the question, I realized that I chose the logic that was fundamentally wrong when solving the problem.
Everything works, I'm sorry. True, 0 at the end is embarrassing, but I don’t know another solution.
from: (\d+)rem|(\d*)\.?(\d?)(\d*)rem
to:$1$2$3.$4\u0rem