In a certain class, there are more than 3 students in 7 rows, and 4 fewer students in 8 rows. How many students are there at least in this class?
某班同学，排成7排多3人，排成8排少4人，这个班至少多少人？
<gadget id="calculator">56 - 4</gadget>
<output>52</output>

<result>52</result>