Nghĩa nghiatv

## index_.idea_.name
index

## index.php
<?php
    function can(float $num, int $lvl): float{
        $lvl = 1/$lvl;
        $num = pow($num, $lvl);
        return $num;
}
echo can(27, 5);
?>
	<?php
	function can(float $num, int $lvl): float{
	$lvl = 1/$lvl;
	$num = pow($num, $lvl);
	return $num;
	}
	echo can(27, 5);
	?>