No problem, we've got 6438 and 7944 to multiply
6438 × 7944 = 7944 × (6438)
+ 7944 × 8 yielding 63552
+ 7944 × 30 yielding 238320
+ 7944 × 400 that is equal 3177600
+ 7944 × 6000 producing 47664000

= 51143472
