The number of students in Class 1 of the fifth year is between 40 and 50. They are divided into study groups, each group of 4 or 5 students, and there are 3 students in each group. How many students are there in Class 1 of the fifth year?
五年1班的学生数在40～50人之间，他们分学习小组，每4人一组或5人一组，都余3人．五年1班有学生多少人．
<gadget id="calculator">40 + 3</gadget>
<output>43</output>

<result>43</result>