Class one is divided into four groups on average, and class two is divided into six groups on average. As a result, there are four more students in each group of class one than in each group of class two. How many students are there in these two classes?

Class one is divided into four groups on average, and class two is divided into six groups on average. As a result, there are four more students in each group of class one than in each group of class two. How many students are there in these two classes?

4×4=16