Alright, let's work through 8406 times 8679 step by step
8406 × 8679 = 8679 × (8406)
+ 8679 × 6 resulting in 52074
+ 8679 × 00 what gives us 0
+ 8679 × 400 yielding 3471600
+ 8679 × 8000 yielding 69432000

= 72955674
