When two numbers are divided, the quotient is 28, the remainder is 7, and the dividend is 539. What is the divisor?
两数相除，商是28，余数是7，被除数是539，除数是多少．
<gadget id="calculator">539 - 7</gadget>
<output>532</output>

<gadget id="calculator">532 / 28</gadget>
<output>19</output>

<result>19</result>