Alright, let's work through 6447 times 445 step by step
6447 × 445 = 445 × (6447)
+ 445 × 7 yielding 3115
+ 445 × 40 what gives us 17800
+ 445 × 400 giving us 178000
+ 445 × 6000 what gives us 2670000

= 2868915
