Alright, let's work through 6660 times 8718 step by step
6660 × 8718 = 8718 × (6660)
+ 8718 × 0 which equals 0
+ 8718 × 60 which equals 523080
+ 8718 × 600 that equals 5230800
+ 8718 × 6000 that is equal 52308000

= 58061880
