Alright, let's work through 4020 times 4018 step by step
4020 × 4018 = 4018 × (4020)
+ 4018 × 0 what gives us 0
+ 4018 × 20 that is equal 80360
+ 4018 × 000 what gives us 0
+ 4018 × 4000 giving us 16072000

= 16152360
