Alright, let's work through 6473 times 6439 step by step
6473 × 6439 = 6439 × (6473)
+ 6439 × 3 that is equal 19317
+ 6439 × 70 what gives us 450730
+ 6439 × 400 which equals 2575600
+ 6439 × 6000 what gives us 38634000

= 41679647
