No problem, we've got 4789 and 4172 to multiply
4789 × 4172 = 4172 × (4789)
+ 4172 × 9 resulting in 37548
+ 4172 × 80 giving us 333760
+ 4172 × 700 giving us 2920400
+ 4172 × 4000 producing 16688000

= 19979708
