Custom number format with comma scaling (,,) not properly applied

[aerobing]

When reading cells with custom number formats that use comma-based scaling (e.g., #,##0,, to divide by 1,000,000), excelize does not correctly apply the scaling transformation. Instead, it returns the raw value with thousand separators plus trailing literal commas.

Trailing commas in a number format pattern should indicate scaling, e.g.
#,##0, divides by 1,000
#,##0,, divides by 1,000,000
#,##0,,, divides by 1,000,000,000
But logic for this does not seem to exist in the number format parser numberHandler / getNumberFmtConf

Behaviour
Format: #,##0,,
Raw cell value: 9767948584
Expected formatted output: 9,768
Actual formatted output: 9,767,948,584,

Steps to reproduce
I encountered this issue parsing the following file:
Tryg_A_S_ADDITIONAL_DATA_2025Q1.xlsx

Using the following code:

f, _ := excelize.OpenFile("test.xlsx")
rows, _ := f.Rows("Income Overview")
for rows.Next() {
    cols, _ := rows.Columns(excelize.Options{RawCellValue: false})
    for _, cell := range cols {
        // Cells are incorrectly formatted, eg "9,767,948,584," instead of "9,768"
    }
}