Alright, let's work through 5638 times 5113 step by step
5638 × 5113 = 5113 × (5638)
+ 5113 × 8 what gives us 40904
+ 5113 × 30 giving us 153390
+ 5113 × 600 what gives us 3067800
+ 5113 × 5000 what gives us 25565000

= 28827094
