Alright, let's work through 6441 times 3258 step by step
6441 × 3258 = 3258 × (6441)
+ 3258 × 1 yielding 3258
+ 3258 × 40 what gives us 130320
+ 3258 × 400 that equals 1303200
+ 3258 × 6000 that results in 19548000

= 20984778
