Alright, let's work through 3628 times 5824 step by step
3628 × 5824 = 5824 × (3628)
+ 5824 × 8 producing 46592
+ 5824 × 20 that is equal 116480
+ 5824 × 600 that equals 3494400
+ 5824 × 3000 that equals 17472000

= 21129472
