No problem, we've got 1640 and 5289 to multiply
1640 × 5289 = 5289 × (1640)
+ 5289 × 0 what gives us 0
+ 5289 × 40 what gives us 211560
+ 5289 × 600 producing 3173400
+ 5289 × 1000 giving us 5289000

= 8673960
