Alright, let's work through 7872 times 1021 step by step
7872 × 1021 = 1021 × (7872)
+ 1021 × 2 which equals 2042
+ 1021 × 70 resulting in 71470
+ 1021 × 800 producing 816800
+ 1021 × 7000 giving us 7147000

= 8037312
