Alright, let's work through 6446 times 1787 step by step
6446 × 1787 = 1787 × (6446)
+ 1787 × 6 that is equal 10722
+ 1787 × 40 what gives us 71480
+ 1787 × 400 resulting in 714800
+ 1787 × 6000 producing 10722000

= 11519002
