Alright, let's work through 4478 times 3639 step by step
4478 × 3639 = 3639 × (4478)
+ 3639 × 8 producing 29112
+ 3639 × 70 what gives us 254730
+ 3639 × 400 giving us 1455600
+ 3639 × 4000 which equals 14556000

= 16295442
