Price setting

Hello!
I have one problem that I can’t solve))) I’m using the Aliexpress Dropshipping and Fulfillment for WooCommerce plugin and I need to make all the prices of the products that I import to my site increase as a percentage. The dollar exchange rate to the Turkmen manat is 1 to 3.52. But I don’t need it like that and I manually indicated 1 to 20.00
Now, when I import a product, for example, with a price of $50, then the product is not imported to me for 1000 tmt, but much more. I set the range manually, but it did not help me. Tell me or help me make it so that all my goods after import are multiplied by 20 tmt. And how to do the same with products that have already been imported to my site, I already have 3000 of them