Currency conversion to opencard

Hello. There is such a site https://pechi-top.ru/

Some goods are unloaded for example goods https://pechi-top.ru/kelt - 6,400

https://belfortkamin.ru/yandexmarket/b0a565e9-6f13-41b0-9e4d-cfd615b87494.xml, but the unloading on which it is updated, and there it costs 640.00 EUR

It is necessary to resuscitate the conversion on the site for dollars and euros, who can help write off