Alright, let's work through 2809 times 6638 step by step
2809 × 6638 = 6638 × (2809)
+ 6638 × 9 yielding 59742
+ 6638 × 00 what gives us 0
+ 6638 × 800 resulting in 5310400
+ 6638 × 2000 that results in 13276000

= 18646142
