Alright, let's work through 3631 times 5827 step by step
3631 × 5827 = 5827 × (3631)
+ 5827 × 1 producing 5827
+ 5827 × 30 that results in 174810
+ 5827 × 600 that is equal 3496200
+ 5827 × 3000 producing 17481000

= 21157837
