Neep help from a developer to modify how the price is displayed

As our Business is in Indonesia, the Law requires to display all prices in IDR, but unfortunately, stripe and PayPal doesn’t support IDR.

I would like to have the prices saved in EUR, and the display should be

1’400’000 IDR ( 90.00 EUR)

90 EUR is the fixed price and 1’400’000 is calculated ROUNDUP(15.55555*$Price;0)*1000

I’m almost sure this can be achieved with a hook

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