5 x 4 means 5 groups of 4

5 x 4 = 5 + 4 x 4

5 x 4 = 4 + 4 x 4

3 x 8 = 3 + 2 x 8

3 x 8 means 3 groups of 8

3 x 8 = 8 + 8 + 8

7 x 5 = 5 + 5 + 5 + 4 x 5

7 x 5 = 7 + 7 + 5 x 5

7 x 5 = 5 + 5 + 5 + 5 + 5 + 5 + 5

6 x 4 = 4 x 4 + 2 x 4

6 x 4 = 4 + 4 + 4 + 4 + 4 +4

4 x 7 = 7 + 3 x 7

4 x 7 = 2 x 7 x 7