Xiao Ming accidentally took the dividend 159 as 195 when doing the question, and the resulting quotient was 3 more than the correct answer, but the remainder was the same. What is the divisor?
小明做题时不小心把被除数159看成了195，结果得到的商比正解答案多了3，但是余数却是相同的，除数是多少？
<gadget id="calculator">195 - 159</gadget>
<output>36</output>

<gadget id="calculator">36 / 3</gadget>
<output>12</output>

<result>12</result>