Alright, let's work through 5690 times 721 step by step
5690 × 721 = 721 × (5690)
+ 721 × 0 resulting in 0
+ 721 × 90 yielding 64890
+ 721 × 600 that results in 432600
+ 721 × 5000 giving us 3605000

= 4102490
