Alright, let's work through 1021 times 1685 step by step
1021 × 1685 = 1685 × (1021)
+ 1685 × 1 which equals 1685
+ 1685 × 20 that is equal 33700
+ 1685 × 000 which equals 0
+ 1685 × 1000 resulting in 1685000

= 1720385
