We can find the answer using the rule of three:
If US$1 is equal to C$1.5777, then US$500 US dollar is equal to:
$1 US dollar ----------- $1.5777 CAD dollar
$500 US dollar ---------- x CAD dollar
Where x= ($500 US dollars * $1.5777 CAD dollars) / $1 US dollar
x = $788.85 CAD dollars
She will get $788.85 CAD dollars