How do you divide 4 squares each into 4?

To divide 4 squares, each into 4 smaller squares, you can simply draw a grid within each square. By dividing each original square into 4 equal parts, you can achieve this by drawing one horizontal line and one vertical line through the center of each square. This results in 16 smaller squares total, with each of the original 4 squares now containing 4 smaller squares.