Let's calculate 6647 x 6591
6647 × 6591 = 6591 × (6647)
+ 6591 × 7 resulting in 46137
+ 6591 × 40 what gives us 263640
+ 6591 × 600 what gives us 3954600
+ 6591 × 6000 that results in 39546000

= 43810377
