Need help. How to change the cost and currency?

Question

React

I ask you not to kick hard with slippers) maybe the question and its solution are stupid and easy) But I just recently started to learn React. Please help. Write a code

Task: There are 3 products, if you click on the button ( USD, EUR, UAH, RUB ) then the price of the product changes (it is different for everyone at once) and the currency.
Below is their starting price. By clicking on the button ( Buy ), then total - should calculate the price for all three products.

Answer 1

https://freelance.habr.com/

Answer 2

The function must be written that will change the Price depending on the current rate.