Teacher Li took all the students in the fifth grade class to participate in the tree planting activity. The students were divided into 3 groups on average. If the teachers and students planted 231 trees, and Mr. Li planted one more tree than each student, how many students are there in the fifth grade class? ．
李老师带着五年级一班的全体同学参加植树活动，学生恰好平均分成3组，如果师生共植树231棵，而李老师比每个同学多植树一颗，五年级一班有学生多少人．
<gadget id="calculator">46 - 1</gadget>
<output>45</output>

<result>45</result>