Alright, let's work through 5155 times 1284 step by step
5155 × 1284 = 1284 × (5155)
+ 1284 × 5 what gives us 6420
+ 1284 × 50 giving us 64200
+ 1284 × 100 that results in 128400
+ 1284 × 5000 producing 6420000

= 6619020
