Alright, let's work through 3621 times 5908 step by step
3621 × 5908 = 5908 × (3621)
+ 5908 × 1 that results in 5908
+ 5908 × 20 resulting in 118160
+ 5908 × 600 that results in 3544800
+ 5908 × 3000 producing 17724000

= 21392868
