Alright, let's work through 6287 times 6504 step by step
6287 × 6504 = 6504 × (6287)
+ 6504 × 7 producing 45528
+ 6504 × 80 that results in 520320
+ 6504 × 200 which equals 1300800
+ 6504 × 6000 what gives us 39024000

= 40890648
