No problem, we've got 8402 and 1509 to multiply
8402 × 1509 = 1509 × (8402)
+ 1509 × 2 yielding 3018
+ 1509 × 00 that is equal 0
+ 1509 × 400 what gives us 603600
+ 1509 × 8000 that is equal 12072000

= 12678618
