http://www.perlmonks.org?node_id=1083459


in reply to Re^3: Results depending on evaluation order
in thread Results depending on evaluation order

You can prepend a q before the ( to make eval work correctly, i.e. report the difference.
$premium = eval q($number * ( 1 + 10/100 ));
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ