Alright, let's work through 6644 times 676 step by step
6644 × 676 = 676 × (6644)
+ 676 × 4 that results in 2704
+ 676 × 40 which equals 27040
+ 676 × 600 that results in 405600
+ 676 × 6000 yielding 4056000

= 4491344
