No problem, we've got 3420 and 4272 to multiply
3420 × 4272 = 4272 × (3420)
+ 4272 × 0 which equals 0
+ 4272 × 20 that equals 85440
+ 4272 × 400 that is equal 1708800
+ 4272 × 3000 producing 12816000

= 14610240
