We have that 1 US is equivalent to 0.82 Euro [Jan 24 2021], now we will have the following:
[tex]\text{USD}\cdot\frac{0.82}{1}=0.82\text{USD}[/tex]So, the expression to convert USD to Euro[Jan 24 2021] is:
[tex]0.82\text{USD}[/tex]Where we replace USD for the number of dollars we want to convert.