Xinxing Elementary School's "Environmental Guard" team of 12 people participated in the tree planting activity. Each male student planted 3 trees, and each female student planted 2 trees. At the end, the number of male students is 1 more than that of female students. How many male students are there?
新星小学"环保卫士"小分队12人参加植树活动，男同学每人栽3棵树，女同学每人栽2棵树．结束时，男同学比女同学多种了1棵，男同学有多少人．
<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<result>5</result>