No problem, we've got 4890 and 8669 to multiply
4890 × 8669 = 8669 × (4890)
+ 8669 × 0 what gives us 0
+ 8669 × 90 giving us 780210
+ 8669 × 800 yielding 6935200
+ 8669 × 4000 resulting in 34676000

= 42391410
