convert currency during the checkout page depending on the selected payment gate

my main website is USD, I have a payment gateway that accepts only local currency “DZD”
I want to know if the client clicks on the local payment gateway, the currency will be automatically converted to DZD?

you can see the example for another website here: https://youtu.be/jrO5i0DMsKs

conclusion: I want to convert currency during the checkout page depending on the selected payment gateway by the user,
-if he selects payment gatway1 >> currency automatic changed to EURO
-if he selects payment gatway2 >> currency will automatically changed to DZD
-if he selects payment gatway3 >> currency automatic changed to USD