"Primary School Students Learning World" is a monthly publication, and it is issued once a month. The latest issue is the 72nd issue. How many years has this publication been published?
《小学生学习天地》这本刊物是月刊，每月发行一期，最新的一期是第72期，这本刊物创刊多少年了．
<gadget id="calculator">72 / 12</gadget>
<output>6</output>

<result>6</result>