Alright, let's work through 9021 times 2842 step by step
9021 × 2842 = 2842 × (9021)
+ 2842 × 1 what gives us 2842
+ 2842 × 20 producing 56840
+ 2842 × 000 resulting in 0
+ 2842 × 9000 giving us 25578000

= 25637682
