Use 
sub divides1 { 
    my($d, $n) = @_; 
    $d < $n ? 
        $d & 1 ? 
            $n & 1 ? divides($d, $n - $d) : divides($d, $n >> 1) : 
            $n & 1 ? 0 : divides($d >> 1, $n >> 1) :
        $d == $n; 
} 
sub divides { 
    0 == $_[1] || divides1(abs $_[0], abs $_[1]) 
}

[download]
or simply 
sub divides { 
    0 == $_[0] ? 0 == $_[1] : 0 == $_[1] % $_[0] 
}

[download]

Update: fixed newline in divides1 subroutine.

In reply to Re: Find if a number is a multiple of a number. by ambrus
in thread Find if a number is a multiple of a number. by Baratski

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