We're going to solve 8905 multiplied by 4200
8905 × 4200 = 4200 × (8905)
+ 4200 × 5 yielding 21000
+ 4200 × 00 what gives us 0
+ 4200 × 900 producing 3780000
+ 4200 × 8000 what gives us 33600000

= 37401000
