Alright, let's work through 8818 times 644 step by step
8818 × 644 = 644 × (8818)
+ 644 × 8 that results in 5152
+ 644 × 10 what gives us 6440
+ 644 × 800 which equals 515200
+ 644 × 8000 yielding 5152000

= 5678792
