No problem, we've got 6639 and 4153 to multiply
6639 × 4153 = 4153 × (6639)
+ 4153 × 9 giving us 37377
+ 4153 × 30 that results in 124590
+ 4153 × 600 what gives us 2491800
+ 4153 × 6000 yielding 24918000

= 27571767
