Alright, let's work through 2021 times 8215 step by step
2021 × 8215 = 8215 × (2021)
+ 8215 × 1 giving us 8215
+ 8215 × 20 that equals 164300
+ 8215 × 000 that results in 0
+ 8215 × 2000 giving us 16430000

= 16602515
