Alright, let's work through 2020 times 1639 step by step
2020 × 1639 = 1639 × (2020)
+ 1639 × 0 yielding 0
+ 1639 × 20 which equals 32780
+ 1639 × 000 resulting in 0
+ 1639 × 2000 which equals 3278000

= 3310780
