Alright, let's work through 8660 times 7421 step by step
8660 × 7421 = 7421 × (8660)
+ 7421 × 0 that results in 0
+ 7421 × 60 what gives us 445260
+ 7421 × 600 giving us 4452600
+ 7421 × 8000 producing 59368000

= 64265860
