No problem, we've got 4120 and 3280 to multiply
4120 × 3280 = 3280 × (4120)
+ 3280 × 0 yielding 0
+ 3280 × 20 that results in 65600
+ 3280 × 100 what gives us 328000
+ 3280 × 4000 that results in 13120000

= 13513600
