We're going to solve 4212 multiplied by 4065
4212 × 4065 = 4065 × (4212)
+ 4065 × 2 what gives us 8130
+ 4065 × 10 what gives us 40650
+ 4065 × 200 producing 813000
+ 4065 × 4000 producing 16260000

= 17121780
