Alright, let's work through 4855 times 6428 step by step
4855 × 6428 = 6428 × (4855)
+ 6428 × 5 what gives us 32140
+ 6428 × 50 resulting in 321400
+ 6428 × 800 resulting in 5142400
+ 6428 × 4000 giving us 25712000

= 31207940
