Alright, let's work through 4004 times 7897 step by step
4004 × 7897 = 7897 × (4004)
+ 7897 × 4 that is equal 31588
+ 7897 × 00 giving us 0
+ 7897 × 000 yielding 0
+ 7897 × 4000 that is equal 31588000

= 31619588
