8 × 0
1 × ❏ = 8
❏ × 1 = 8
3 × 8 = 24 and
6 × 8 = 48,
24 + 48 = 72
3 × 6 = 18 and
8 × 8 = 64,
18 + 64 = 82
6 × 8 = 40,
24 + 40 = 64
3 × 8 = 32 and
32 + 48 = 80