If conditional multiplication

Tarig Elsawi 

Depending upon the situation, one possible solution is to write a named Lambda function

ExtractCurrencyFormatλ

= LAMBDA(ref,
    LET(
      rawFormat, GET.CELL(7, ref), 
      TEXTBEFORE(TEXTAFTER(rawFormat, "["), "]")
    )
  )

The worksheet formula would be 

= ExtractCurrencyFormatλ(currencyAmount)
for a single value, or
= MAP(currencyAmount, ExtractCurrencyFormatλ)
for an array.

Reference:

How to find the currency format in a formula | MrExcel Message Board