Let's calculate 6487 x 2427
6487 × 2427 = 2427 × (6487)
+ 2427 × 7 which equals 16989
+ 2427 × 80 resulting in 194160
+ 2427 × 400 that is equal 970800
+ 2427 × 6000 resulting in 14562000

= 15743949
