Naming of large numbers

So in my game the total points should be displayed as follows:

1000 -1 K
10000- 10 K
100000- 1 M
1000000000 -1 B

how can i achieve this ?

Here you go.
sample.gdg (14.1 KB)

Wow Thanks world like a charm. Although there is a slight problem where the number needs to be rounded up for example
1234 needs to be shown as 1.2 K . Any solution for this?

Here you go. Should work now.
Sample.gdg (17.3 KB)

Thank you Pleox, worked like a charm