It is useful to calculate how much bank will charge you depending on used currency (applies when one converts one currency to another, especially with multiple options available).
https://kagi.com/search?q=1+EUR+%2F+0%2C81091+GBP
https://www.google.com/search?channel=fs&client=ubuntu&q=1+EUR+%2F+0%2C81091+GBP
