No problem, we've got 4485 and 4820 to multiply
4485 × 4820 = 4820 × (4485)
+ 4820 × 5 yielding 24100
+ 4820 × 80 what gives us 385600
+ 4820 × 400 producing 1928000
+ 4820 × 4000 producing 19280000

= 21617700
