Given that the quotient is 15, the remainder is 12, and the dividend is 687, what is the divisor?
已知商是15，余数是12，被除数是687，那么除数是多少
<gadget id="calculator">687 - 12</gadget>
<output>675</output>

<gadget id="calculator">675 / 15</gadget>
<output>45</output>

<result>45</result>