The number of students in class 2 of the sixth grade is between 40 and 50. When doing exercises, there are no leftovers when standing in 3 or 4 rows. What is the number of people in this class?
六年级2班的人数在40和50之间，做操时站3行或4行都正好没有剩余，这个班的人数是多少？
<gadget id="calculator">2 * 2 * 3</gadget>
<output>12</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<result>48</result>