No problem, we've got 2840 and 9039 to multiply
2840 × 9039 = 9039 × (2840)
+ 9039 × 0 resulting in 0
+ 9039 × 40 giving us 361560
+ 9039 × 800 that results in 7231200
+ 9039 × 2000 what gives us 18078000

= 25670760
