Build the meaning
Draw six rows of four dots. Count 4, 8, 12, 16, 20, 24. There are 24 dots, so 6 × 4 = 24.
Turn the paper. It now shows four rows of six, still 24 dots. This explains why 6 × 4 and 4 × 6 have the same answer, even though the grouping story can differ.