Alright, let's work through 5639 times 5172 step by step
5639 × 5172 = 5172 × (5639)
+ 5172 × 9 giving us 46548
+ 5172 × 30 producing 155160
+ 5172 × 600 what gives us 3103200
+ 5172 × 5000 producing 25860000

= 29164908
