No problem, we've got 8421 and 4907 to multiply
8421 × 4907 = 4907 × (8421)
+ 4907 × 1 giving us 4907
+ 4907 × 20 yielding 98140
+ 4907 × 400 producing 1962800
+ 4907 × 8000 which equals 39256000

= 41321847
