No problem, we've got 4155 and 3456 to multiply
4155 × 3456 = 3456 × (4155)
+ 3456 × 5 that is equal 17280
+ 3456 × 50 that is equal 172800
+ 3456 × 100 that is equal 345600
+ 3456 × 4000 that equals 13824000

= 14359680
