No problem, we've got 8643 and 2420 to multiply
8643 × 2420 = 2420 × (8643)
+ 2420 × 3 producing 7260
+ 2420 × 40 giving us 96800
+ 2420 × 600 which equals 1452000
+ 2420 × 8000 yielding 19360000

= 20916060
