Alright, let's work through 8406 times 6603 step by step
8406 × 6603 = 6603 × (8406)
+ 6603 × 6 that equals 39618
+ 6603 × 00 which equals 0
+ 6603 × 400 giving us 2641200
+ 6603 × 8000 what gives us 52824000

= 55504818
