No problem, we've got 4021 and 3374 to multiply
4021 × 3374 = 3374 × (4021)
+ 3374 × 1 what gives us 3374
+ 3374 × 20 yielding 67480
+ 3374 × 000 that is equal 0
+ 3374 × 4000 yielding 13496000

= 13566854
