No problem, we've got 2280 and 3689 to multiply
2280 × 3689 = 3689 × (2280)
+ 3689 × 0 that results in 0
+ 3689 × 80 that is equal 295120
+ 3689 × 200 what gives us 737800
+ 3689 × 2000 what gives us 7378000

= 8410920
