Alright, let's work through 4004 times 9968 step by step
4004 × 9968 = 9968 × (4004)
+ 9968 × 4 that results in 39872
+ 9968 × 00 yielding 0
+ 9968 × 000 what gives us 0
+ 9968 × 4000 giving us 39872000

= 39911872
