Alright, let's work through 4178 times 1622 step by step
4178 × 1622 = 1622 × (4178)
+ 1622 × 8 giving us 12976
+ 1622 × 70 giving us 113540
+ 1622 × 100 yielding 162200
+ 1622 × 4000 what gives us 6488000

= 6776716
