The students in class one of the fifth grade are divided into several study groups, and the points of 3 and 3 are just finished, and the points of 5 and 5 are also just finished. It is known that the number of students in this class is between 40-50, do you know how many students are in this class? Write down your thought process.
五年级一班的学生分成若干个学习小组，3个3个地分正好分完，5个5个的分也正好分完．已知这个班的学生人数在40-50之间，你知道这个班有多少名学生吗？请写出思考过程．
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>