No problem, we've got 4215 and 3545 to multiply
4215 × 3545 = 3545 × (4215)
+ 3545 × 5 resulting in 17725
+ 3545 × 10 that equals 35450
+ 3545 × 200 that results in 709000
+ 3545 × 4000 which equals 14180000

= 14942175
