In a division formula with a remainder, the sum of the dividend, divisor, quotient and remainder is 519. Given that the quotient is 15 and the remainder is 12, what is the divisor?
在一道有余数的除法算式中，被除数、除数、商和余数的和是519，已知商是15，余数是12，那么除数是多少．
<gadget id="calculator">519 - 12 - 15 - 12</gadget>
<output>480</output>

<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<gadget id="calculator">480 / 16</gadget>
<output>30</output>

<result>30</result>