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$num1     = 523.20;
$num2     = 23.2;
$eq        = 500;
print ("$num1,    $num2,    ($eq,    ". ($num1 - $num2) ."),    ". ($n
+um1 - $num2 eq $eq) .",    ". (($num1 - $num2) == $eq). ".\n");