Alright, let's work through 6660 times 8941 step by step
6660 × 8941 = 8941 × (6660)
+ 8941 × 0 that equals 0
+ 8941 × 60 what gives us 536460
+ 8941 × 600 what gives us 5364600
+ 8941 × 6000 that is equal 53646000

= 59547060
