No problem, we've got 4020 and 4032 to multiply
4020 × 4032 = 4032 × (4020)
+ 4032 × 0 producing 0
+ 4032 × 20 which equals 80640
+ 4032 × 000 that equals 0
+ 4032 × 4000 that equals 16128000

= 16208640
