Let's calculate 6646 x 6343
6646 × 6343 = 6343 × (6646)
+ 6343 × 6 which equals 38058
+ 6343 × 40 that results in 253720
+ 6343 × 600 resulting in 3805800
+ 6343 × 6000 resulting in 38058000

= 42155578
