Alright, let's work through 6444 times 1881 step by step
6444 × 1881 = 1881 × (6444)
+ 1881 × 4 yielding 7524
+ 1881 × 40 producing 75240
+ 1881 × 400 which equals 752400
+ 1881 × 6000 that results in 11286000

= 12121164
