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Level 2

take your value and split it into an array

use len to find out how many numbers are in your value

Len(s1)  Returns the number of characters in a given string.

String.length

then using a little math split it using

Left and Right

Left(s1, n1)  Extracts a specified number of characters from a string, starting with the first character on the left.

String.substring(n1, n2)

Right(s1, n1)  Extracts several characters from a given string, beginning with the last character on the right.

String.substring(n1, n2)

when done modifiying the decimal portion of your array as I described earlier then concat them back together

Concat(s1 [, s2... ] )  Returns the concatenation of two or more strings.

String.concat(s1, s2 [, s3 ... ])