Alright, let's work through 8021 times 8355 step by step
8021 × 8355 = 8355 × (8021)
+ 8355 × 1 producing 8355
+ 8355 × 20 which equals 167100
+ 8355 × 000 that equals 0
+ 8355 × 8000 producing 66840000

= 67015455
