We're going to solve 5081 multiplied by 4057
5081 × 4057 = 4057 × (5081)
+ 4057 × 1 yielding 4057
+ 4057 × 80 giving us 324560
+ 4057 × 000 which equals 0
+ 4057 × 5000 giving us 20285000

= 20613617
