Alright, let's work through 3884 times 4220 step by step
3884 × 4220 = 4220 × (3884)
+ 4220 × 4 giving us 16880
+ 4220 × 80 what gives us 337600
+ 4220 × 800 that is equal 3376000
+ 4220 × 3000 that is equal 12660000

= 16390480
