We're going to solve 8383 multiplied by 643
8383 × 643 = 643 × (8383)
+ 643 × 3 what gives us 1929
+ 643 × 80 what gives us 51440
+ 643 × 300 resulting in 192900
+ 643 × 8000 what gives us 5144000

= 5390269
