At the beginning of the new semester, Uncle Li from the stationery store sent 150 math notebooks to Class 4 and Class 2. After the average distribution among the 45 students in the class, there were 15 left. How many books are assigned to each student. ?
新学期开学，文具店的李叔叔给四2班同学送来150本数学薄，平均分给全班45个同学后还剩15本．每个同学分到多少本．？
<gadget id="calculator">150 - 15</gadget>
<output>135</output>

<gadget id="calculator">135 / 45</gadget>
<output>3</output>

<result>3</result>