Alright, let's work through 3855 times 424 step by step
3855 × 424 = 424 × (3855)
+ 424 × 5 that equals 2120
+ 424 × 50 producing 21200
+ 424 × 800 that is equal 339200
+ 424 × 3000 that equals 1272000

= 1634520
