Alright, let's work through 3869 times 5120 step by step
3869 × 5120 = 5120 × (3869)
+ 5120 × 9 which equals 46080
+ 5120 × 60 that is equal 307200
+ 5120 × 800 what gives us 4096000
+ 5120 × 3000 that equals 15360000

= 19809280
