Alright, let's work through 9027 times 8645 step by step
9027 × 8645 = 8645 × (9027)
+ 8645 × 7 that results in 60515
+ 8645 × 20 giving us 172900
+ 8645 × 000 that results in 0
+ 8645 × 9000 that results in 77805000

= 78038415
